| A | B |
|---|
| excess | too much of something |
| cell | small building block thatworks together to create tissue |
| organ | a body part with a particular function; tissue works together to form these |
| system | organs work together to form this |
| cardiovascular | a term referring to the heart and circulatory system working together |
| digestion | the breaking down of food into usable parts |
| arteries | carry the oxygenated blood away from the heart and lungs to the rest of the body |
| veins | carry the used blood without oxygen and food, back to the lungs |
| capillaries | the smallest tubes in the circulatory system |
| lungs | the main organs of the respiratory system |
| aveoli | tiny air sacks; part of the respiratory system |
| skull | part of the skletal system that protects the brain |
| muscles | connect to bones and emable your body to move by pulling |
| bones | there are 206 of these in the human body |
| vertebrae | another name for backbone; protects the spinal cord |
| heart | main organ of the circulatory system |
| fist | this is the approximate size of the heart |
| brain | main organ of the nervous system; the control center of the body |
