| A | B |
|---|
| digestive tract | the food tube, open at both ends |
| peristalsis | the movement of food along the food tube by muscles |
| esophagus | the part of the food tube between the mouth and the stomach |
| mechangical digestion | the breaking down of food by the teeth and tongue |
| saliva | a liquid found in the mouth |
| enzyme | a chemical substance that helps digest food |
| physical change | a change in the size or shape of something |
| gastric juice | a liquid produced by the stomach |
| pepsin rennin | enzyme found in gastric juice |
| casein | a milk protein |
| lipase | the enzyme that digests fats |
| bile | a green liquid produced by the liver |
| gall bladder | the small sac under the liver where bile is stored |
| emulsification | a process of breaking down large particles into smaller particles |
| villi | tiny, finger-like parts that stick out from the walls of the small intestine |
| lacteals | the parts of the villi through which fats pass into the bloodstream |
