| A | B |
|---|
| calorie | the basic unit of food energy |
| cellulose | a kind of carbohydrate that people cannot digest |
| cholestrol | a waxy substance made by the body and also found in fatty foods |
| digestion | the process by which the body breaks food down into nutrients that can be absorbed by the cells |
| enzyme | a substance that causes chemicals to change from in the body |
| esophagus | a tube behind the windpipe that carries food from the mouth to the stomach |
| minerals | non-living substances found in small amounts in certain foods |
| proteins | nutrients in foods that buid body tissues |
| saliva | a liquid in the mouth that aids digestion |
| villi | tiny finger-shaped projections in the walls of the samll intestine that absorb digested food into the blood |
| vitamins | living substances found in certain foods that the body needs to function properly and to resist diseases |
