| A | B |
|---|
| nucleus | directs activities of cell |
| organ | structure composed of different kinds of tissue |
| joint | where two bones come together |
| connective tissue | fat, cartilage, bone, tendons, and blood |
| organ system | organs working together |
| digestive system | breaks down food so body can use |
| circulatory system | transport oxygen |
| white blood cells | fight disease |
| muscle tissue | body tissue that can contract |
| platelets | help blood clot |
| response | reaction to a stimulus |
| nervous system | carries messages back and forth between brain and other body parts |
| valve | keep blood going in one one direction |
| homeostasis | maintaining internal conditions |
| endocrine system | produces chemicals that control activities through hormones |
| plasma | carry water/food to cells |
| epiglottis | keeps food from entering lungs |
| kidney | produces urine |
| liver | produces bile |
| large intestine | absorb water during digestion |
