| A | B |
|---|
| skeletal system | supports and protects body |
| muscular system | works in pairs to move the bones |
| digestive system | breaks down food into usable parts |
| circulatory system | delivers oxygen and nutrients and removes wastes |
| respiratory system | provides oxygen and removes carbon dioxide |
| nervous system | responsible for thoughts and all body activites |
| villi | absorb nutrients in the small intestine |
| alveioli | tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged |
| epiglotis | prevents food from entering the windpipe |
| tendons | narrow end of muscles that attach to bones |
| phalanges | finger bones |
| gastrocnemius | calf muscle (lower leg muscle) |
| ventricles | lower chambers of the heart |
| atria | upper chambers of the heart |
| neuron | nerve cell |
| eyes | busiest muscles in the body |
| diaphragm | muscle that helps you breathe |
| arteries | deliver oxygen rich blood to the body |
| veins | return blood with carbon dioxide to heart for more oxygen |
| femur | longest bone in body (in the leg) |
| stirrup | smallest bone in body (in the ear) |
| kidneys | remove chemical wastes from the blood |
| hormones | chemicals released from endocrine glands; means "excite" |
| plasma | substance that makes up the majority of blood |
| macrophage | type of white blood cell that helps to fight infection |
| ganglia | masses of nerve cells |
| amylase | chemical in saliva that breaks down starches into sugar |
| pancreas | controls the amount of blood sugar |
