Organ System Overview PDF

ORGAN SYSTEM OVERVIEW WHAT IS AN ORGAN SYSTEM? Organ systems are groups of organs within the body working together as a unit to carry out specific tasks or functions within the organism. The human body is divided into  eleven organ systems. Remember that no one organ...

ORGAN SYSTEM OVERVIEW WHAT IS AN ORGAN SYSTEM? Organ systems are groups of organs within the body working together as a unit to carry out specific tasks or functions within the organism. The human body is divided into  eleven organ systems. Remember that no one organ system ever functions independently of the others. 1. INTEGUMENTARY SYSTEM Largest organ in the body approximately 2 square meters 16% of the body weight External covering, first line of defense Vitamin D synthesis Regulate body temperature  Protects us from deep tissue injuries & contains sensory receptors Skin, hair and nails SKINTERESTING INFORMATION! Your skin naturally sheds off and renews itself every 28 days. You start aging at the age of 20. Once you hit 25 your collagen levels starts to deplete which will eventually result in fine lines and wrinkles. Your skin contains approximately 1000 species of bacteria Staphylococcus, Enterobacter, Klebsiella, Escherichia coli, and Proteus species 2. SKELETAL SYSTEM Support, framework & movement Protective functions (internal organs) Storehouse for minerals (Calcium & Phosphate) Red blood cell production  206 bones in the human body 15% of the body weight Bones, joints and cartilages 3. MUSCULAR SYSTEM Movement or mobility Framework, support and stability Muscles have the ability contract 600-650 muscles in the human body 40-50% of the total body weight Respiration, digestion, urination Skeletal, cardiac and smooth muscles  4. NERVOUS SYSTEM Body’s fast acting control system Responds to external stimuli Sensory receptors (detect changes in the environment) Average human brain weighs around 1300-1400 grams (around 3 pounds) 15 cm in length Brain and the spinal cord Central Nervous System & Peripheral Nervous System BRAINY FACTS!  60% of the human brain is made of fat. Your brain isn't fully formed until age 25. Brain development begins from the back of the brain and works its way to the front. Therefore, your frontal lobes, which control planning and reasoning, are the last to strengthen and structure  connections. BRAINY FACTS! The human brain can generate about 23 watts of power (enough to power a lightbulb). All that power calls for some much-needed rest. Adequate sleep helps maintain the pathways in your brain. It’s a myth that you only use 10  percent of your brain. You use all of it. (Yes, even when you are sleeping.) Neurologists confirm that your brain is always active. 5. ENDOCRINE SYSTEM Endocrine glands secretes hormones from the target organs straight into the bloodstream. Hormones: growth, repair and reproduction, metabolism They are not connected anatomically Pituitary, thyroid, parathyroid,  adrenal glands, thymus, pancreas, pineal, ovaries & testes. 6. CARDIOVASCULAR SYSTEM Delivers oxygen, nutrients & hormones Removes waste products of metabolism to excretory organs Protects body against diseases and infections. Weighs between 10-12 ounces (280- 340 grams) a little larger than your  fist size. Heart, blood vessels and blood BROKEN HEART SYNDROME Heart strings (chordae tendineae) can sometimes break after a deep emotional trauma causing the heart to lose form and as a result be unable to pump blood effectively. Medically and literally speaking a person can die from a broken heart. Broken heart syndrome could mimic the signs & symptoms of a heart attack. 7. LYMPHATIC SYSTEM The lymphatic system works together with the cardiovascular system (immune function) Lymphatic vessels returns leaked tissue fluids into the  bloodstream. Cleanse the blood and house white blood cells involved in immunity. Lymphatic vessels, lymph nodes, and other lymphoid organs 8. RESPIRATORY SYSTEM Keeps the body supplied with oxygen Gas exchange Normal adult lungs weighs approximately 1000 grams 24 cm in height  Lungs, nasal passages, pharynx, larynx, trachea, bronchi and alveoli 9. DIGESTIVE SYSTEM Series of tube running through the body from the mouth to the anus. Breakdown of food for nutrients Metabolism Excretion of waste material Delivers digestive enzymes Mouth, esophagus, stomach, small and large intestines and rectum. Accessory organs: liver, pancreas, gall bladder, salivary glands)  10. URINARY SYSTEM Excretory system Excretion of waste materials from the body (nitrogen-containing waste) Urine formation Electrolyte balance Acid-base balance Regulate normal blood pressure Kidneys, bladder, ureters and  urethra 11. REPRODUCTIVE SYSTEM Reproduction Male (testes), Female (ovaries) Female uterus provides an environment for fetal development Testosterone, Estrogen and Progesterone “It’s incredible how the human body is. That it could do so much. That it can go beyond the everydayness of life. That it can be extraordinary and powerful and harbor a spirit of hope and pure will.” – Lynne Cox