| Term | Definition |
| Injestion | the process of taking in food |
| Physical Digestion | the process of breaking food into smaller pieces (example: chewing) |
| Chemical Digestion | the process of breaking bonds in food molecules with the use of enzymes |
| Absorption | the process of cells of the digestive tract taking up the products of digestion |
| Peristalsis | wavelink contraction by the smooth muscle of the digestive tract |
| Cardiac Sphincter | circular muscle that protects the esophagus from the acids of the stomach |
| Small Intestines | Organ where most chemical digestion and absorption takes place |
| Villi | Small fingerlike projections on the walls of the small intestines that increase surface area |
| Large Intestines | location of mutualistic bacteria (E. coli) that feed on waste products and produce vitamins |
| Liver | Organ that produces bile |
| Gall Bladder | Organ that stores bile |
| Pancreas | Organ that produces insulin, enzymes and sodium bicarbonate |
| Insulin | Hormone that signals the liver to pick up extra glucose in the blood stream |
| Glucagon | Hormone that signals the liver to release glucose into the blood stream |
| Amylase | Enzyme that breaks down carbohydrates |
| Pepsin | Enzyme that breaks down proteins in the stomach |
| Egestion | (aka - Elimination) the release of undigestible food material |
| Pyloric Sphincter | circular muscle that controls the movement of chyme from the stomach to the small intestines |