Podcast
Questions and Answers
Which of the following is NOT one of the three issues mentioned?
Which of the following is NOT one of the three issues mentioned?
Loss of water by evaporation is considered a mechanical issue.
Loss of water by evaporation is considered a mechanical issue.
False
Name one method through which bacterial infection can occur.
Name one method through which bacterial infection can occur.
Contamination
Mechanical damage, bacterial infection, and _____ are identified issues.
Mechanical damage, bacterial infection, and _____ are identified issues.
Signup and view all the answers
Match the following conditions to their descriptions:
Match the following conditions to their descriptions:
Signup and view all the answers
What is a common consequence of mechanical damage?
What is a common consequence of mechanical damage?
Signup and view all the answers
Evaporation contributes positively to the conditions discussed.
Evaporation contributes positively to the conditions discussed.
Signup and view all the answers
Which of the following is NOT a function of the human skin?
Which of the following is NOT a function of the human skin?
Signup and view all the answers
The malpighian layer is the outermost layer of the epidermis.
The malpighian layer is the outermost layer of the epidermis.
Signup and view all the answers
What is the primary pigment responsible for the color of human skin?
What is the primary pigment responsible for the color of human skin?
Signup and view all the answers
The granular layer consists of ________ of flattened cells.
The granular layer consists of ________ of flattened cells.
Signup and view all the answers
Match the skin layers to their characteristics:
Match the skin layers to their characteristics:
Signup and view all the answers
Which of the following activities does the skin NOT perform?
Which of the following activities does the skin NOT perform?
Signup and view all the answers
African negroes have genetically dark-colored skin due to higher amounts of melanin.
African negroes have genetically dark-colored skin due to higher amounts of melanin.
Signup and view all the answers
List two functions of the skin.
List two functions of the skin.
Signup and view all the answers
The ________ layer presses outward to replace the worn-out cells of the outermost cornified layer.
The ________ layer presses outward to replace the worn-out cells of the outermost cornified layer.
Signup and view all the answers
The dermis does NOT contain which of the following?
The dermis does NOT contain which of the following?
Signup and view all the answers
Which of the following is NOT a channel through which heat is lost from the body?
Which of the following is NOT a channel through which heat is lost from the body?
Signup and view all the answers
The human body temperature is typically highest in the early morning.
The human body temperature is typically highest in the early morning.
Signup and view all the answers
What is the principal heat-regulating centre of the body?
What is the principal heat-regulating centre of the body?
Signup and view all the answers
Heat is lost when cold food, water, or cold beverages are taken into the body. This loss occurs through the _______.
Heat is lost when cold food, water, or cold beverages are taken into the body. This loss occurs through the _______.
Signup and view all the answers
Match the method of heat loss with its description:
Match the method of heat loss with its description:
Signup and view all the answers
What structure does a hair contain that provides it with a blood supply?
What structure does a hair contain that provides it with a blood supply?
Signup and view all the answers
A nail has five parts.
A nail has five parts.
Signup and view all the answers
Name one part of the hair that has a blood supply.
Name one part of the hair that has a blood supply.
Signup and view all the answers
A nail consists of the nail plate, nail bed, and the __________.
A nail consists of the nail plate, nail bed, and the __________.
Signup and view all the answers
Match the following parts of hair and nails with their descriptions:
Match the following parts of hair and nails with their descriptions:
Signup and view all the answers
Which part of the hair helps in its growth?
Which part of the hair helps in its growth?
Signup and view all the answers
The sebaceous gland is involved in the formation of nails.
The sebaceous gland is involved in the formation of nails.
Signup and view all the answers
What is the visible part of the nail called?
What is the visible part of the nail called?
Signup and view all the answers
Hair is formed within a __________ found under the skin.
Hair is formed within a __________ found under the skin.
Signup and view all the answers
Which of the following is NOT a part of the hair structure?
Which of the following is NOT a part of the hair structure?
Signup and view all the answers
Match the following structures with their functions:
Match the following structures with their functions:
Signup and view all the answers
What is the primary function of the erector muscle of the hair?
What is the primary function of the erector muscle of the hair?
Signup and view all the answers
The skin becomes extra oily in cold and dry weather due to increased sebum secretion.
The skin becomes extra oily in cold and dry weather due to increased sebum secretion.
Signup and view all the answers
What are the three common problems related to sebaceous glands?
What are the three common problems related to sebaceous glands?
Signup and view all the answers
In hot and humid weather, the skin becomes extra oily due to an increased secretion of __________.
In hot and humid weather, the skin becomes extra oily due to an increased secretion of __________.
Signup and view all the answers
Match the condition with its description:
Match the condition with its description:
Signup and view all the answers
How long does the duration of scalp hair growth typically last?
How long does the duration of scalp hair growth typically last?
Signup and view all the answers
Hairs in human being do not play a role in forensic investigations.
Hairs in human being do not play a role in forensic investigations.
Signup and view all the answers
What helps prevent foreign particles from entering the eyes?
What helps prevent foreign particles from entering the eyes?
Signup and view all the answers
Patients with inflamed sebaceous glands commonly experience __________.
Patients with inflamed sebaceous glands commonly experience __________.
Signup and view all the answers
What happens to an open pore when it is clogged with dead skin cells and sebum?
What happens to an open pore when it is clogged with dead skin cells and sebum?
Signup and view all the answers
Study Notes
Skin - "The Jack of All Trades"
- Skin is more than just a covering; it's a complex organ with numerous vital functions
- It's the largest organ in the body, comprising approximately 15% of an adult's total body weight
- Skin acts as a barrier, protecting underlying tissues from mechanical damage, fluid loss, disease-causing germs, and harmful UV light
- Skin is a sensory organ, detecting touch, pain, pressure, heat, etc.
- It regulates body temperature, releasing heat in warm weather and retaining it in cold
- Stores reserve food in fat cells
- Participates in excretion (primarily by sweating)
What is Skin?
- The outermost layer of the body's covering
- Extensive network of structures and glands originate from it
Functions of the Skin
-
Protection: Primary function, offering protection against four threats:
- Mechanical shocks
- Excessive water loss
- Harmful substances and diseases
- Excess UV light
- Sensation: Detects various sensations like touch, pain, heat, and pressure
- Temperature Regulation: Maintains internal body temperature by releasing or retaining heat
- Storage: Fat cells in the skin store reserve food
- Excretion: Supports the excretion process by eliminating water, salts, and a small amount of urea through sweating
- Vitamin D Synthesis: Minor function, synthesizing vitamin D when exposed to sunlight.
Structure of the Skin
- Two main layers: Epidermis (outer) and Dermis (inner)
-
Epidermis: Stratified epithelium, layered structure, with specialized regions: cornified, granular, malpighian layers
- The cornified layer consists of a tough protein called keratin protecting from various factors
- Stratum malpighi, the innermost layer, contains melanin, the pigment offering coloration (e.g., complexion)
- Dermis: Inner layer, comprises collagen fibres, elastic fibers, blood vessels, nerve endings, hair follicles, sweat glands
- Derivatives: Structures originating from the epidermis and dermis, including hair, nails, sweat glands, and sebaceous glands
-
Epidermis: Stratified epithelium, layered structure, with specialized regions: cornified, granular, malpighian layers
Skin Coloration
- Due to melanin, a pigment located in the melanocytes of the malpighian layer
- Differences in melanin content lead to varying skin colors among humans
Skin Derivatives
- Hair: Provides insulation and protection from environmental extremes
- Nails: Provide protection for the tips of the fingers and toes
- Sebaceous Glands: Secrete sebum, an oily substance that keeps skin supple and waterproof, preventing moisture loss
- Mammary Glands: Specialized sweat glands that produce milk
- Sweat Glands: Responsible for cooling the body by eliminating water and salts through perspiration (sweat)
Skin and Other Functions
- Helps in the sense of touch
- Involved in regulating body temperature
- Plays a role in excreting substances (sweat)
- Skin is a major organ protecting from harmful environmental elements
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.