Answer
The 11 organ systems of the body are the following:
1. the integumentary system
function: protects deeper tissues from injury; produces vitamin D (+sunlight); regulates body temperature by excretion (perspiration)
two organs: skin, hair, fingernails
2. the skeletal system
function: supports the body; supports movement (+skeletal muscles)
two organs: bones, cartilages, joints
3. the muscular system
function: contraction (aka. shortening of the muscles; causes movement) (the only function)
two organs: skeletal muscles (shoulder muscles, hamstring muscles)
4. the nervous system
function: responds to stimuli (internal and external)
two organs: brain, spinal cord, nerves, sensory receptors
5. the endocrine system
function: produces hormones
two organs: endocrine glands (thyroid, ovaries)
6. the cardiovascular system
function: through blood, ensures the transport of oxygen, hormones, and nutrients to organs and, then, picks up waste; role in the immune system
two organs: heart, blood vessels
7. the lymphatic system
function: regulates bloodstream; immunity; cleanses the body
two organs: lymphatic vessels, lymph nodes, spleen, tonsils
8. the respiratory system
function: ensures oxygen supply and eliminates carbon dioxide
two organs: lungs, nasal passages
9. the digestive system
function: ensures digestion and the delivery of resulting nutrients into blood
two organs: stomach, mouth
10. the urinary system
function: disposal of waste by-products
two organs: kidneys, ureters
11. the reproductive system
function: produce offsprings
two organs: uterus, scrotum
Work Step by Step
This information is detailed at pp. 29-33.
