The document summarizes the anatomy and structure of the digestive system. It describes the different organs that make up the digestive tract, including the mouth, tongue, esophagus, stomach, intestines, liver and pancreas. Diagrams are included to illustrate the locations and components of each organ system involved in digestion. Key structures are defined such as the teeth, salivary glands, layers of the stomach and intestinal walls, blood vessels and nerves of the digestive organs.