anatomy and physiology unit 2

what is cancer

uncontrolled cell growth that can invade surrounding tissue

way to prevent skin cancer

avoid over exposure to UV light and wear sunscreen

way to prevent lung cancer

avoid polluted air and switch to eco friendly/economic

way to avoid carinogens

eat less red meat and processed foods

way to avoid several cancers

exercise regularly since obesity increase risk for cancer and changes how body functions

4 functions of skin

temp regulation, protection, vitamin d synthesis, touch + talk

skin temperature regulation

• skin controls temperature by releasing sweat when body gets too hot

• blood vessels can either dilate or constrict to regulate temp

hyperthermia

higher body temp that results in dehydration

• occurs above 101 F or 38 C

hypothermia

lower body temp than normal that interferes with body’s normal functions

• occurs below 95 F or 35 C

skin protection

provides outer layer that protects from dirt, disease, and dehydration

vitamin d synthesis

skin produced precursor to vitamin d which gets synthesized by the sun

• vitamin d is activated in the liver and kidneys into the hormone calcitriol which regulates bone growth and helps with calcium absorption