Human Anatomy

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Questions and Answers

Which function is primarily associated with the central nervous system (CNS)?

  • Relaying sensory information from the skin to the brain.
  • Coordinating and controlling complex bodily functions. (correct)
  • Regulating heart rate and digestion.
  • Transmitting signals from the brain to the muscles.

What is the main function of a neuron's myelin sheath?

  • To transmit neurotransmitters to the next neuron.
  • To protect the neuron from physical damage.
  • To insulate the axon and speed up nerve impulse transmission. (correct)
  • To generate electrical signals within the neuron.

At a synapse, what process facilitates communication between two neurons?

  • Release of neurotransmitters to transmit signals. (correct)
  • Exchange of genetic material between the neurons.
  • Direct electrical connection between the neurons.
  • Physical merging of the two neurons.

What is the primary role of veins in the venous system?

<p>To return deoxygenated blood back to the heart. (B)</p> Signup and view all the answers

Which of the following is a typical symptom of varicose veins?

<p>Swollen, twisted veins visible near the skin's surface. (A)</p> Signup and view all the answers

What is a common cause of Deep Vein Thrombosis (DVT)?

<p>Prolonged periods of inactivity and poor circulation. (A)</p> Signup and view all the answers

Chronic Venous Insufficiency (CVI) is primarily caused by which of the following?

<p>Impaired venous valve function. (A)</p> Signup and view all the answers

What is the role of lymphatic vessels within the lymphatic system?

<p>To transport lymph fluid back into the bloodstream. (D)</p> Signup and view all the answers

Which of the following components is NOT a primary element of the lymphatic system?

<p>Arterioles. (C)</p> Signup and view all the answers

What is the main function of lymph nodes?

<p>To filter lymph and assist in immune responses. (C)</p> Signup and view all the answers

What is the primary function of the endocrine system?

<p>To regulate bodily functions through hormone secretion. (C)</p> Signup and view all the answers

Diabetes mellitus is primarily characterized by:

<p>The body's inability to properly regulate blood sugar levels. (D)</p> Signup and view all the answers

How does the sympathetic nervous system generally affect the body?

<p>It prepares the body for 'fight or flight' responses. (B)</p> Signup and view all the answers

Which function is primarily controlled by the brain stem?

<p>Regulation of basic life functions like breathing and heart rate. (C)</p> Signup and view all the answers

What is a key characteristic of Addison's disease?

<p>Deficiency in cortisol and aldosterone production. (A)</p> Signup and view all the answers

The mandibular nerve is primarily responsible for:

<p>Sensory and motor functions in the lower face. (C)</p> Signup and view all the answers

What is the role of skeletal muscles?

<p>Facilitating movement through contractions. (D)</p> Signup and view all the answers

What triggers a reaction from a skeletal muscle?

<p>Nerve impulses. (D)</p> Signup and view all the answers

What is the function of facial nerves?

<p>Control the muscles of facial expression. (C)</p> Signup and view all the answers

What is the function of arteries?

<p>To carry oxygenated blood away from the heart. (A)</p> Signup and view all the answers

Which of the following skin changes is commonly associated with PMS due to hormonal fluctuations?

<p>Dryness and dullness, possibly exacerbated by prostaglandin production. (D)</p> Signup and view all the answers

Acupuncture is used as a therapy for which of the following conditions?

<p>Dysmenorrhea (A)</p> Signup and view all the answers

What is a key characteristic of primary amenorrhea?

<p>The absence of menstruation in a person who has not had a period by age 15. (C)</p> Signup and view all the answers

What is a main cause of secondary amenorrhea?

<p>Pregnancy (A)</p> Signup and view all the answers

Which of the following best describes secondary amenorrhea?

<p>The absence of three or more consecutive menstrual periods in someone who previously had periods. (B)</p> Signup and view all the answers

What common characteristic is shared between endometriosis and pelvic inflammatory disease?

<p>Both can affect the female reproductive system. (C)</p> Signup and view all the answers

Why might waxing or shaving be inadvisable during PMS?

<p>Increased pain sensitivity. (C)</p> Signup and view all the answers

What is the primary characteristic of dysmenorrhea?

<p>Cyclic pelvic pain associated with menstruation. (C)</p> Signup and view all the answers

What factor primarily determines the specific approach to treating amenorrhea?

<p>Underlying cause. (A)</p> Signup and view all the answers

What is the relationship between testosterone and skin condition during PMS?

<p>Without extra testosterone, skin tends to look dry and dull during PMS due to reduced sebum production. (C)</p> Signup and view all the answers

Which factor differentiates primary amenorrhea from secondary amenorrhea?

<p>Whether the patient has had periods in the past. (D)</p> Signup and view all the answers

Which of the following symptoms is MOST likely associated with changes in estrogen levels?

<p>Alterations in mood, sleep, and reproductive function. (B)</p> Signup and view all the answers

A patient is diagnosed with amenorrhea. Which question is most important to ask to understand the type of amenorrhea?

<p>Have you ever had a menstrual period before? (B)</p> Signup and view all the answers

Which approach is generally recommended to manage skin dryness associated with PMS?

<p>Moisturizing to hydrate the skin (A)</p> Signup and view all the answers

Which statement reflects effects of endometriosis?

<p>It impacts female reproductive health. (B)</p> Signup and view all the answers

What primary concern is linked to infertility?

<p>Difficulties in conceiving children. (A)</p> Signup and view all the answers

What role do prostaglandins potentially play in the context of PMS?

<p>Making the skin extra tender. (C)</p> Signup and view all the answers

Which condition is characterized by the absence of cyclic pelvic pain?

<p>Amenorrhea (C)</p> Signup and view all the answers

Which factor most directly influences whether treatment is required for amenorrhea?

<p>Underlying cause. (B)</p> Signup and view all the answers

Which of the following is associated with dysmenorrhea?

<p>A common clinical disease, with cyclic pelvic pain. (D)</p> Signup and view all the answers

Which body system is responsible for covering and protecting the entire body?

<p>Integumentary System (A)</p> Signup and view all the answers

Which component is NOT a primary element of the skeletal system?

<p>Tendons (A)</p> Signup and view all the answers

What is the primary function of the circulatory system?

<p>To deliver oxygen and nutrients to the tissues (B)</p> Signup and view all the answers

The muscular system performs which of the following functions?

<p>Covering, shaping, and supporting skeletal tissue (A)</p> Signup and view all the answers

What role does the nervous system play in the human body?

<p>Activating body responses and sensory information (D)</p> Signup and view all the answers

Which function is associated with the digestive system?

<p>Absorption of nutrients (C)</p> Signup and view all the answers

The primary role of the excretory system involves:

<p>Controlling water balance and removing wastes from the blood (A)</p> Signup and view all the answers

What is the main function of the respiratory system?

<p>To enable breathing and supply the body with oxygen (B)</p> Signup and view all the answers

Which of the following is the main role of the immune/lymphatic system?

<p>Returning fluid to blood and defending against pathogens (C)</p> Signup and view all the answers

What is the primary function of the reproductive system?

<p>Generation of new life (D)</p> Signup and view all the answers

In the circulatory system, what is the function of red blood cells?

<p>Carrying oxygen to the cells (A)</p> Signup and view all the answers

What is the role of white blood cells in the circulatory system?

<p>To protect the body against infection (A)</p> Signup and view all the answers

What function do platelets perform in the blood?

<p>Facilitating blood clotting (B)</p> Signup and view all the answers

Which of the following is a key function of the lymph vascular system?

<p>Filtering the blood (B)</p> Signup and view all the answers

What is the role of the pituitary gland in the endocrine system?

<p>Secretes hormones that control other glands (A)</p> Signup and view all the answers

Which hormone is secreted by the pituitary gland and is crucial for ovulation?

<p>Luteinizing Hormone (LH) (B)</p> Signup and view all the answers

What is the impact of non-functioning tropic hormones released by the pituitary gland?

<p>Hyperpigmentation (D)</p> Signup and view all the answers

Which of the following hormones is produced by the adrenal cortex and regulates blood pressure?

<p>Mineralocorticoids (B)</p> Signup and view all the answers

What possible effect can high testosterone levels in females cause?

<p>Excessive hair growth on the chin and upper lip (C)</p> Signup and view all the answers

Which hormone's primary influence is the regulation of the body's metabolic rate, or energy levels?

<p>Thyroid (A)</p> Signup and view all the answers

What hormone is responsible for calcium homeostasis?

<p>Calcitonin (D)</p> Signup and view all the answers

In individuals of PCOS, what services would consultation change?

<p>Laser hair removal (C)</p> Signup and view all the answers

Addison's disease causes which of the following integumentary effects?

<p>Darkening of the skin - especially in sites of friction (A)</p> Signup and view all the answers

Which condition is characterized by excessive body and facial hair resulting from hormonal fluctuations?

<p>Hirsutism (A)</p> Signup and view all the answers

What are the potential benefits of natural hormone replacement therapy?

<p>Long-term anti-aging (D)</p> Signup and view all the answers

What can high testosterone levels cause in females?

<p>Male pattern characteristics (D)</p> Signup and view all the answers

What is chloasma?

<p>Sun exposed skin on the upper cheeks, forehead, and or upper lip turn a tan (B)</p> Signup and view all the answers

Why is understanding disorders such as Cushing's syndrome by estheticians so crucial?

<p>Setting timelines for healing - from protocols (B)</p> Signup and view all the answers

Understanding and regulating excessive stress is important for the regulation of which gland?

<p>Adrenal glands (C)</p> Signup and view all the answers

Which of the following is a true statement about Cushing's syndrome that an esthetician should be aware of?

<p>It can cause fragile skin that heals poorly (C)</p> Signup and view all the answers

What are the signs of thyroid disease?

<p>Muscular weakness and constant fatigue (D)</p> Signup and view all the answers

What part of adrenal glands produces adrenaline and noradrenaline?

<p>Medulla (B)</p> Signup and view all the answers

What is the term MSH related to?

<p>Male coyote-stimulating hormone (C)</p> Signup and view all the answers

What is the important action of mineralocorticoids?

<p>Regulating blood pressure and electrolyte balance (C)</p> Signup and view all the answers

What is the location of thyroid?

<p>Neck (B)</p> Signup and view all the answers

If the adrenal glands produces excessive cortisol, the individual will deal with which syndrome?

<p>Cushing’s syndrome (D)</p> Signup and view all the answers

During intense situations, which of the adrenal gland produces the body's “fight or flight” response?

<p>Medulla (B)</p> Signup and view all the answers

What type of fluid carries waste products to liver and kidneys for elimination?

<p>Blood (C)</p> Signup and view all the answers

Which function is NOT a primary responsibility of the central nervous system (CNS)?

<p>Connecting the brain and spinal cord to limbs and organs. (C)</p> Signup and view all the answers

The myelin sheath's primary function is to decrease the speed of nerve impulse transmission along the axon.

<p>False (B)</p> Signup and view all the answers

What is the primary role of neurotransmitters in the nervous system?

<p>chemical messenger between neurons</p> Signup and view all the answers

__________ veins are characterized by enlarged, twisted veins often found in the legs.

<p>varicose</p> Signup and view all the answers

Match each venous system disorder with its description:

<p>Varicose Veins = Enlarged, twisted veins, often in the legs. Deep Vein Thrombosis (DVT) = Blood clot in a deep vein. Chronic Venous Insufficiency (CVI) = Blood pools in legs due to poor venous return.</p> Signup and view all the answers

Which of the following is NOT a primary function of the lymphatic system?

<p>Transporting oxygen to tissues. (B)</p> Signup and view all the answers

Lymph flow primarily relies on the force of gravity to move fluid towards the heart.

<p>False (B)</p> Signup and view all the answers

__________ is a condition characterized by high blood sugar levels due to issues with insulin production or function.

<p>diabetes mellitus</p> Signup and view all the answers

Match each endocrine disorder with its description:

<p>Hyperthyroidism = Overactive thyroid (weight loss, anxiety). Hypothyroidism = Underactive thyroid. Cushing's Syndrome = Excess cortisol. Addison's Disease = Low cortisol.</p> Signup and view all the answers

During a stressful situation, which part of the nervous system is responsible for the "fight or flight" response?

<p>Sympathetic nervous system (A)</p> Signup and view all the answers

The zygomatic nerve primarily controls muscles in the lower jaw/mandible area.

<p>False (B)</p> Signup and view all the answers

List three physiological responses that occur in the body during the fight or flight response.

<p>increased heart rate, pupil dilation, adrenaline release</p> Signup and view all the answers

__________ muscle tissue is under conscious control and attached to bones.

<p>skeletal</p> Signup and view all the answers

Match each muscle with its primary location:

<p>Occipitofrontalis = Scalp Corrugator supercilii = Eyebrow Nasalis = Nose Orbicularis oris = Mouth</p> Signup and view all the answers

Which of the following best describes the role of the brain stem?

<p>Vital functions and information relay. (A)</p> Signup and view all the answers

Motor nerves carry sensory information from the body to the central nervous system.

<p>False (B)</p> Signup and view all the answers

What is the name of the largest cranial nerve, often associated with facial sensation and motor control?

<p>trigeminal nerve (CN V)</p> Signup and view all the answers

__________ carry oxygenated blood away from the heart.

<p>arteries</p> Signup and view all the answers

Match each component of the blood with its primary function:

<p>Red cells = Oxygen transport White cells = Immune defense Platelets = Blood clotting Plasma = Fluid matrix</p> Signup and view all the answers

Which organ system is responsible for transporting nutrients, oxygen, and waste throughout the body?

<p>Circulatory system (B)</p> Signup and view all the answers

The primary function of the skeletal system is limited to providing structural support to the body.

<p>False (B)</p> Signup and view all the answers

Define homeostasis in the context of the human body.

<p>Homeostasis is the body's ability to maintain a stable internal environment despite changes in external conditions.</p> Signup and view all the answers

The ______ system produces hormones that regulate body functions.

<p>endocrine</p> Signup and view all the answers

Match each muscle type with its primary function or location:

<p>Skeletal muscle = Attached to bones for voluntary movement Smooth muscle = Found in internal organs for involuntary actions Cardiac muscle = Exclusively found in the heart for involuntary contractions</p> Signup and view all the answers

Which two systems coordinate to facilitate movement in the human body?

<p>Skeletal and Muscular systems (A)</p> Signup and view all the answers

Voluntary control refers to actions that occur automatically without conscious thought.

<p>False (B)</p> Signup and view all the answers

List three functions that the nervous system performs in the human body.

<p>Sense stimuli, process information, and respond with actions.</p> Signup and view all the answers

The first line of defense of the human body against external threats is the ______ .

<p>skin</p> Signup and view all the answers

Match the anatomical direction with its description:

<p>Anterior = Front of the body Posterior = Back of the body Superior = Above or toward the head Inferior = Below or toward the feet</p> Signup and view all the answers

What is the role of mitochondria within a cell?

<p>To produce energy (ATP) (C)</p> Signup and view all the answers

Mitosis results in two cells that are genetically different from the parent cell.

<p>False (B)</p> Signup and view all the answers

What is transported in the blood?

<p>nutrients, oxygen, waste</p> Signup and view all the answers

Fluid balance is maintained by the ______ system.

<p>lymphatic</p> Signup and view all the answers

Match the type of respiratory organ to its description

<p>Larynx = Voice box Lungs = Spongey organs where gas exchange occurs Diaphragm = Muscle that contracts/relaxes, enabling breath</p> Signup and view all the answers

Which of the following describes the direction 'lateral'?

<p>Away from the midline of the body (B)</p> Signup and view all the answers

Sensory nerves are the only kind of nerve in the body.

<p>False (B)</p> Signup and view all the answers

Does mitosis heal the body?

<p>yes</p> Signup and view all the answers

The cell membrane is a thin, flexible ______ .

<p>layer</p> Signup and view all the answers

Match the type of tissue to its description:

<p>Connective = For support Epithelial = For covering Muscle = For contracting nerve = For communicating</p> Signup and view all the answers

Why is the study of anatomy and physiology essential for estheticians?

<p>It lays the groundwork for providing effective and high-quality esthetic services. (A)</p> Signup and view all the answers

Anatomy focuses solely on the function of organs and body systems, while physiology focuses on their structures.

<p>False (B)</p> Signup and view all the answers

What is the primary difference between gross anatomy and histology?

<p>Gross anatomy deals with structures visible to the naked eye, whereas histology studies structures visible only with a microscope.</p> Signup and view all the answers

The chemical processes occurring within cells that provide nutrients for growth and reproduction are collectively known as ________.

<p>metabolism</p> Signup and view all the answers

Match the following metabolic processes with their correct descriptions:

<p>Anabolism = Building larger molecules from smaller ones; supports growth and energy storage. Catabolism = Breaking down complex molecules into smaller ones for energy use.</p> Signup and view all the answers

During which metabolic process does the liver and kidneys produce glucose from non-carbohydrate sources?

<p>Anabolism (C)</p> Signup and view all the answers

Catabolism involves building and storing new molecules, whereas anabolism involves breaking down molecules for energy.

<p>False (B)</p> Signup and view all the answers

Briefly describe what happens to food molecules during catabolism.

<p>Large, complex food molecules are broken down into smaller, simpler molecules to release energy for the body's use.</p> Signup and view all the answers

__________ tissue functions to cover and protect body surfaces and internal organs.

<p>Epithelial</p> Signup and view all the answers

Which type of tissue is responsible for supporting, protecting, and holding the body together?

<p>Connective tissue (D)</p> Signup and view all the answers

Nerve tissue's primary function is to contract and produce movement in the body.

<p>False (B)</p> Signup and view all the answers

What is the primary function of nerve tissue?

<p>Nerve tissue carries messages to and from the brain and coordinates body functions.</p> Signup and view all the answers

__________ tissue contracts to produce movement.

<p>Muscle</p> Signup and view all the answers

What does liquid tissue, a type of connective tissue, primarily transport throughout the body?

<p>Food, waste products, and hormones (A)</p> Signup and view all the answers

Tissues are composed of multiple organs working together to perform a specific function.

<p>False (B)</p> Signup and view all the answers

What is the relationship between tissues and organs in the human body?

<p>Tissues make up organs, with different types of tissues combining to form an organ that performs specific functions.</p> Signup and view all the answers

Organs that collaborate to perform particular tasks for the body are referred to as __________ __________.

<p>body systems</p> Signup and view all the answers

Which of the following best describes a 'body system'?

<p>Organs working together to perform one or more functions. (A)</p> Signup and view all the answers

The stomach is an example of a body system because it digests food.

<p>False (B)</p> Signup and view all the answers

Match the tissue type with its primary function:

<p>Epithelial Tissue = Covers and protects body surfaces and internal organs. Connective Tissue = Supports, protects, and holds the body together. Nerve Tissue = Carries messages to and from the brain; coordinates body functions. Muscle Tissue = Contracts to produce movement.</p> Signup and view all the answers

Which directional term describes a position nearer to the trunk of the body?

<p>Proximal (B)</p> Signup and view all the answers

The popliteus is anterior to the patella.

<p>False (B)</p> Signup and view all the answers

The term that describes the side or direction toward the side of the body is called ______.

<p>lateral</p> Signup and view all the answers

Which of the following is NOT considered an accessory organ of the skin?

<p>Lacrimal bones (D)</p> Signup and view all the answers

What type of bone is the hyoid?

<p>U-shaped</p> Signup and view all the answers

Smooth muscles are also known as voluntary muscles, contracting with conscious thought.

<p>False (B)</p> Signup and view all the answers

Match the muscle type within its function:

<p>Skeletal = Contracts with conscious thought Smooth = Not under conscious control Cardiac = Specific to heart function and not under conscious control</p> Signup and view all the answers

What connects muscles to bones?

<p>Tendons (A)</p> Signup and view all the answers

The ______ muscle raises the eyebrows and causes wrinkles in the forehead.

<p>frontalis</p> Signup and view all the answers

Which muscle is responsible for compressing the cheeks, as in whistling?

<p>Buccinator (D)</p> Signup and view all the answers

The risorius muscle elevates the upper lip.

<p>False (B)</p> Signup and view all the answers

What is the fluid that is produced by the lacrimal apparatus?

<p>tears</p> Signup and view all the answers

Which statement accurately describes lymph?

<p>Lymph moves in one direction, from tissues to the blood. (B)</p> Signup and view all the answers

The hypothalamus links the nervous system to the endocrine system via the ______ gland.

<p>pituitary</p> Signup and view all the answers

Which hormone does the pineal gland produce?

<p>Melatonin (A)</p> Signup and view all the answers

Enzymes are fats that speed up chemical reactions in the body.

<p>False (B)</p> Signup and view all the answers

What is the name for involuntary muscle contractions that move food through the digestive tract?

<p>peristalsis</p> Signup and view all the answers

Which digestive fluid is produced by the liver and helps breakdown fats?

<p>Bile (B)</p> Signup and view all the answers

[Blank] are tiny vessels that exchange gases, nutrients, and waste.

<p>capillaries</p> Signup and view all the answers

Veins carry oxygen-rich blood away from the heart

<p>False (B)</p> Signup and view all the answers

Flashcards

Central Nervous System (CNS)

The control center; consists of the brain and spinal cord.

Peripheral Nervous System (PNS)

The network of nerves that branch out from the CNS and connect to the rest of the body.

Neurons

The fundamental units of the nervous system responsible for transmitting information.

Cell Body

The main body of a neuron, containing the nucleus and other essential organelles.

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Dendrites

Branch-like extensions of a neuron that receive signals from other neurons.

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Axon

A long, slender projection of a neuron that conducts electrical impulses away from the cell body.

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Myelin Sheath

A fatty insulating layer around the axon of a neuron that speeds up electrical impulses.

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Synapses

Junctions between neurons where neurotransmitters are released to transmit signals.

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Nerve Impulse

An electrical signal that travels along the axon of a neuron.

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Neurotransmitter

Chemical messengers that transmit signals across the synapse between neurons.

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Veins Function

Vessels that carry blood towards the heart

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Varicose Veins

Swollen, twisted veins that occur when valves malfunction and blood pools in the veins.

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Deep Vein Thrombosis (DVT)

A blood clot that forms in a deep vein, usually in the leg.

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Chronic Venous Insufficiency (CVI)

A condition where the veins in the legs have difficulty returning blood to the heart

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Dysmenorrhea

Painful menstruation; a common clinical condition with cyclic pelvic pain.

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Amenorrhea

The absence of menstruation, defined as missing one or more menstrual periods.

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Primary Amenorrhea

Absence of menstruation in someone who hasn't had a period by age 15.

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Secondary Amenorrhea

The absence of three or more consecutive periods in someone who previously had periods.

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PMS Definition

A syndrome consisting of physical and emotional symptoms that occur one to two weeks before menstruation.

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Endometriosis

A condition where tissue similar to the lining of the uterus grows outside the uterus.

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Pelvic Inflammatory Disease (PID)

Infection of the female reproductive organs. It often occurs when sexually transmitted bacteria spread from the vagina to the uterus, fallopian tubes, or ovaries.

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Skeletal System

Provides the body’s framework.

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Muscular System

Enables body movement and generates heat.

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Circulatory System

Transports blood, oxygen, and nutrients throughout the body.

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Nervous System

Sends and receives messages, coordinating body functions.

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Digestive System

Supplies the body with nutrients by processing food.

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Excretory System

Eliminates waste products from the body.

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Respiratory System

Enables gas exchange, supplying oxygen and removing carbon dioxide.

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Endocrine System

Secretes hormones to regulate growth, reproduction, and health.

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Reproductive System

Enables the production of new life.

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Integumentary System

Protects the body from the external environment.

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Integumentary System Components

Skin and accessory organs like hair, nails, and glands.

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Functions of Skin

Regulates temperature, perceives sensation, and produces vitamin D.

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Skeletal System Components

Cartilage, bones, and joints.

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Circulatory System Function

Delivers oxygen and nutrients; equalizes temperature.

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Muscular System Function

Covers skeletal tissue, contracts, and moves body parts.

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Nervous System Components

Brain, spinal cord, and peripheral nerves.

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Digestive System Components

Stomach, liver, intestines, and gall bladder.

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Excretory System Components

Kidneys and urinary bladder.

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Respiratory System Components

Nasal passage, trachea, and lungs.

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Endocrine System Components

Pituitary, thyroid, pancreas, adrenals, testes, and ovaries.

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Immune/Lymphatic Components

Thymus, lymph nodes, spleen, and lymphatic vessels.

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Blood Function

Fluid that carries nutrients & O2; removes waste products.

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Blood Composition

Red blood cells, white blood cells, and platelets.

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White Blood Cell Function

Protects against infection.

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Platelet Function

Required for blood clotting.

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lymph

returns fluid to blood.

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Endocrine system

A system of ductless glands that secrete hormones.

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Pituitary Gland

Located at the base of the brain secretes hormones that cause other glands to make hormones

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Mineralcorticoids

Help to regulate blood pressure and electrolyte balance

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Addison’s disease

The adrenal glands don’t produce enough steroid hormones

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hirsutism

Excessive body and facial hair from hormonal fluctuations

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Thyroid

Located in the neck, consisting of two lobes, controls growth and metabolism

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Cushing’s syndrome

High blood pressure, chronic fatigue, moodiness, and headaches caused by excessive cortisol

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CNS Functions

Processes sensory info, coordinates responses, and controls thought, emotions, and memory.

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Lymphatic System Functions

Returns fluid to blood, filters lymph, removes pathogens, and supports immunity.

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Lymphatic Vessels

Transports lymph fluid throughout the body.

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Lymph Nodes

Filters lymph and houses immune cells for defense.

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Lymphatic Organs

Spleen, thymus, and tonsils which support immune function.

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Lymph Flow

Fluid movement via muscle contraction and valves; one-way towards the heart.

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Endocrine System Functions

Produces and secretes hormones that regulate various bodily functions.

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Diabetes Mellitus

High blood sugar levels due to issues with insulin production or function.

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Hyperthyroidism

Overactive thyroid leading to weight loss and anxiety.

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Hypothyroidism

Underactive thyroid leading to weight gain and fatigue.

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Fight or flight response

Bodies response to stress resulting in increased heart rate and adrenaline release.

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Skeletal muscles (voluntary)

Attached to bones via tendons, allowing for conscious control and movement.

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Arteries Function

Carry oxygenated blood away from the heart to the body.

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Arterioles

Small branches connecting arteries and capillaries.

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Composition of Blood

Red blood cells, white blood cells, platelets, and plasma.

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Waste product elimination

Via lungs (CO2) and kidneys/liver (other wastes).

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What is an organ system?

A group of organs working together to perform a specific function.

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What is an organ?

A structure made of different tissues that performs a specific function.

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Skeletal system function

Provides structure, protection, support, and produces blood cells.

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Nervous system function

Sends and receives messages throughout the body.

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Respiratory system function

Brings oxygen into the body and removes carbon dioxide.

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Digestive system function

Breaks down food to absorb nutrients.

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Urinary system function

Removes waste from the blood and regulates fluid balance.

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Integumentary system function

Protects the body and regulates temperature.

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Reproductive system function

Enables reproduction of offspring.

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What is homeostasis?

Body’s ability to maintain a stable internal environment.

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Nervous System Actions

Sense stimuli, process information, and respond with actions.

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Skeletal muscle is...

Attached to bones (voluntary movement)

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Smooth muscle is...

In internal organs like the stomach (involuntary)

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Cardiac muscle is...

Found only in the heart (involuntary)

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Cell Membrane:

The thin, flexible outer layer of a cell. It protects the cell and controls what goes in and out

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Nucleus:

The control center of the cell that hold the cell’s DNA (genetic material) and tells the cell what to do

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Anatomy

The study of the structure of organs and body systems.

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Physiology

The study of the function of organs and body systems.

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Gross Anatomy

The study of structures visible without a microscope.

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Histology

The microscopic study of tissues and cells.

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Metabolism

All chemical processes within a cell for growth and reproduction.

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Anabolism

Building up larger molecules from smaller ones.

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Catabolism

Breaking down molecules to release energy.

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Epithelial Tissue

Tissue that covers body surfaces and protects organs.

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Connective Tissue

Tissue that supports, protects and holds the body together.

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Nerve Tissue

Tissue that transmits signals to and from the brain.

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Muscle Tissue

The contraction of this tissue produces movement.

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Organs

Tissues combine to form these functional units.

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Body System

Group of organs performing specific functions.

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Anterior

Front of the body.

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Posterior

Back of the body.

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Superior

Above or higher than another part of the body.

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Inferior

Below or lower than another part of the body.

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Lateral

Toward the side of the body.

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Medial

Toward the middle of the body.

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Proximal

Nearer to the point of attachment to the trunk.

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Distal

Farther from the point of attachment to the trunk.

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Accessory Organs of the Skin

Sensory receptors, hair, nails, oily glands, and sweat glands.

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Lacrimal Bones

Smallest and most fragile bones of the face, situated at the front inside part of the eye socket.

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Hyoid Bone

U-shaped bone at the base of the tongue that supports the tongue and its muscles.

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Skeletal (Voluntary) Muscles

Muscles that contract with conscious thought; attached to bones.

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Smooth (Involuntary) Muscles

Muscles not under conscious control.

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Cardiac Muscles

Specific to heart function and not under conscious control.

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Tendons

Connects muscles to bones.

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Ligaments

Connect bones to each other.

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Lacrimal Apparatus

Produces and drains tears.

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Enzymes

Proteins that speed up chemical reactions in the body, including digestion.

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Peristalsis

Involuntary muscle contractions that move food through the digestive tract.

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Villi

Small, finger-like projections in the small intestine that increase surface area for absorption.

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Study Notes

Organ Systems and Examples

  • The digestive system exemplifies an organ system.
  • The heart serves as an example of an organ.

Functions of Body Systems

  • The skeletal system provides structure, protection, support, and produces blood cells.
  • The muscular system enables movement of the body and internal organs.
  • The nervous system sends and receives messages throughout the body.
  • The respiratory system brings oxygen into the body and removes carbon dioxide.
  • The circulatory system transports nutrients, oxygen, and waste through the blood.
  • The digestive system breaks down food to absorb nutrients.
  • The lymphatic system defends against infection and maintains fluid balance.
  • The endocrine system produces hormones that regulate body functions.
  • The urinary system removes waste from the blood and regulates fluid balance.
  • The integumentary system (skin) protects the body and regulates temperature.
  • The reproductive system enables reproduction of offspring.

Skeletal System Importance

  • The skeletal system supports the body, protects organs, allows movement, stores minerals, and makes blood cells in the bone marrow.
  • The skeletal system supports the body, protects internal organs, assists with movement, produces blood cells, and stores calcium, phosphorus, magnesium, and sodium.

Homeostasis Definition

  • Homeostasis is the body’s ability to maintain a stable internal environment despite changes in external conditions.

Movement Systems

  • The skeletal and muscular systems work together to enable body movement.

Nervous System Functions

  • The nervous system senses stimuli, processes information, and responds with actions.
  • Voluntary control: Moving an arm to wave.
  • Involuntary control: Your heart beating.

Muscular System Types

  • Skeletal muscle is attached to bones and facilitates voluntary movement.
  • Smooth muscle is found in internal organs like the stomach and operates involuntarily.
  • Cardiac muscle is exclusively in the heart and functions involuntarily.

Integumentary System

  • The skin (integumentary system) acts as the body's first line of defense.
  • Accessory organs include sensory receptors, hair, nails, oily glands, and sweat glands.

Respiratory System Organs

  • Organs include the nose, nasal cavity, pharynx, larynx, trachea, bronchi, lungs, and diaphragm.

Nerve Cell Signal Relay

  • When a prick is felt, nerve cells relay information to the brain.

Lymphatic and Circulatory Systems

  • The lymphatic system collects excess fluid from tissues and returns it to the circulatory system; it also helps fight infections carried in the blood.
  • Lymph does not circulate like blood but moves in one direction from its collection in tissues to its return in the blood.
  • There are no lymphatic pumps, and valves in the lymphatic vessels prevent the backward movement of lymph.
  • The lymphatic system filters blood by destroying pathogens.

Anatomical Terms

  • Anterior refers to the front of the body.
  • Posterior refers to the back of the body.
  • The popliteus is posterior to the patella.
  • Superior refers to above or toward the head.
  • Inferior refers to below or toward the feet.
  • Lateral refers to away from the midline of the body.
  • Medial describes the middle or direction toward the middle of the body.
  • Proximal describes a position in a limb that is nearer to the point of attachment to the trunk of the body.
  • Distal describes a position in a limb that is farther from the point of attachment to the trunk of the body.

Tissue Types

  • The four types of tissue are connective tissue, epithelial tissue, muscle tissue, and nerve tissue.

Cell Membrane

  • The cell membrane is the thin, flexible outer layer of a cell.
  • It protects the cell and controls what goes in and out.

Nucleus

  • The nucleus is the control center of the cell.
  • It holds the cell’s DNA (genetic material) and tells the cell what to do.

Mitochondria

  • The mitochondria are known as the “powerhouses” of the cell.
  • They produce energy (ATP) from food so the cell can work and stay alive.

Mitosis

  • Mitosis is the process by which a cell divides to make two identical new cells.
  • It’s how the body grows and heals.
  • It’s how the body grows and heals.

Cell Metabolism

  • Cell metabolism refers to all the chemical reactions happening in a cell that keep it alive.
  • This includes breaking down food for energy and building parts the cell needs.

Anatomy and Physiology for Estheticians

  • Knowledge of anatomy and physiology provides the foundation for performing quality esthetic services.
  • Estheticians primarily work with skeletal or voluntary muscles.

Anatomy and Physiology Definitions

  • Anatomy studies organs and systems of the body.
  • Physiology studies the structure and function of organs and systems.
  • Gross anatomy studies structures visible to the naked eye.
  • Histology studies structures visible only through a microscope.

Metabolism Explained

  • Metabolism is the chemical processes in cells providing nutrients for cell growth or reproduction.
  • Metabolism comprises anabolism and catabolism.

Anabolism

  • Anabolism builds larger molecules from smaller ones, like proteins from amino acids.
  • Anabolism supports growth of new cells, maintains body tissues, and stores energy.
  • The liver and kidneys producing glucose from non-carbohydrate sources is an example of anabolism.

Catabolism

  • Catabolism breaks down molecules, like nutrients for glucose.
  • Catabolism happens when you digest food and molecules break down for energy use.
  • Large, complex molecules break down into smaller, simple ones during catabolism.

Types of Tissue

  • Epithelial tissue covers and protects body surfaces and internal organs.
  • Connective tissue supports, protects, and holds tissues together.
  • Nerve tissue carries messages to and from the brain, coordinating body functions.
  • Muscle tissue contracts to produce movement.
  • Liquid connective tissues carry food, waste products, and hormones.

Tissues and Organs

  • Tissues make up organs.
  • Organs working together to perform specific functions form body systems.

Skeletal System Details

  • Lacrimal bones are the smallest and most fragile facial bones, situated at the front inside part of the eye socket.
  • The hyoid bone is a U-shaped bone at the base of the tongue that supports the tongue and its muscles.
  • Bones are connected to each other by ligaments.

Muscular System Details

  • The human body has over 630 muscles, accounting for approximately 40% of body weight.
  • Out of the over 630 muscles, 30 are facial muscles.
  • Skeletal or voluntary muscles contract with conscious thought, while smooth or involuntary muscles are not under conscious control.
  • Cardiac muscles are specific to heart function and are not under conscious control.
  • Skeletal muscles are attached to bones and are controlled by thought processes.
  • Nerve impulses trigger a reaction from the muscle, which contracts, moving the bone or joint it is associated with.
  • Muscles are connected to bones by tendons.
  • There are over 230 moveable and semi-moveable joints in the body.
  • The frontalis muscle raises the eyebrows, draws the scalp forward, and causes wrinkles in the forehead.
  • The occipital muscle is a broad muscle that covers the top of the skull and draws the scalp backward; it has two parts, occipitalis and frontalis.
  • The corrugator muscle is located beneath the frontalis and orbicularis oculi; it draws the eyebrow down and wrinkles the forehead vertically.
  • The levator palpebrae superioris muscle controls the eyelid and can be easily damaged during makeup application.
  • The orbicularis oris muscle circles the mouth and is responsible for closing and puckering the lips.
  • The buccinator muscle compresses the cheeks and aids in chewing and whistling.
  • The zygomaticus major muscle elevates the corners of the mouth and is involved in smiling.
  • The levator labii superioris muscle elevates the upper lip.
  • The depressor anguli oris depresses the corners of the mouth and is involved in frowning.
  • The mentalis elevates and protrudes the lower lip and is involved in expressions of doubt or disdain.
  • The risorius draws the corners of the mouth laterally and is involved in expressions of grinning.

Lacrimal Apparatus

  • The lacrimal apparatus produces and drains tears.
  • Tears (lacrimal fluid) are produced by the lacrimal glands.

Endocrine System

  • The hypothalamus links the nervous system to the endocrine system via the pituitary gland and releases hormones that control the pituitary gland.
  • The pituitary gland, often called the master gland, controls other endocrine glands, and produces growth hormone, thyroid-stimulating hormone, and ACTH.
  • The thyroid gland regulates metabolism, produces energy, and growth, and produces T4 and T3 hormones.
  • The parathyroid glands regulate calcium levels in the blood and produce parathyroid hormone.
  • The adrenal glands produce hormones that regulate metabolism, immune response, and stress, including cortisol and adrenaline.
  • The pancreas regulates blood sugar levels and produces insulin and glucagon.
  • Gonads produce sex hormones that regulate reproductive functions, including estrogen, progesterone, and testosterone.
  • The pineal gland regulates sleep-wake cycles and produces melatonin.

Digestive System

  • Enzymes are proteins that speed up chemical reactions in the body, including digestion.
  • Peristalsis involves involuntary muscle contractions that move food through the digestive tract.
  • Bile is a digestive fluid produced by the liver that helps break down fats.
  • Villi are small, finger-like projections in the small intestine that increase surface area for absorption.

Circulatory System

  • Arteries carry oxygen-rich blood away from the heart.
  • Veins carry oxygen-poor blood back to the heart.
  • Capillaries are tiny vessels that exchange gases, nutrients, and waste.

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