| A | B |
| Mouth | Begins to break down food into smaller pieces through mechanical digestion; saliva in the mouth starts the process of chemical digestion |
| Esophagus | The transport tube that carries chewed food to the stomach |
| Stomach | Continues the process of mechanical digestion; and secretes gastric juices that continue the process of chemical digestion started in the mouth |
| Small Intestine | The organ where most of the chemical digestion of food takes place; nutrients from food are also absorbed through the small intestines |
| Large Intestine | The organ where water is absorbed from the food and taken into the bloodstream; prepares the remaining undigested food for elimination from the body |
| Rectum and Anus | The rectum is a short tube that stores solid waste until it is eliminated from the body through the anus. |
| Liver | A secondary organ of the digestive system that produces bile, which is used by the body to break up fat particles. |
| Gallbladder | A secondary organ to the digestive system that functions to store bile produced by the liver. |
| Pancreas | A secondary organ to the digestive system that functions to produce digestive juices that help to further break down the food in the small intestine. |