The purpose of the digestive system or tract, is to process or break down food for absorption from the intestines into the bloodstream. It also, expels waste products from the body. The digestive system, also called the alimentary canal consists of the mouth, teeth, tongue, pharynx, esophagus, stomach, and large intestines. The accessory glands are salivary glands, liver, and pancreas. They are called accessory glands for their ability to assist other organs in performing their functions, as accessory reproductive organs.
Ellen J. Barrier
Source for diagram:
The American Medical Association