3 concepts
Anatomy of the Digestive System
The human gastrointestinal tract refers to the stomach and intestine, and sometimes to all the structures from the mouth to the anus.
Processes and Functions of the Digestive System
Digestion is necessary for absorbing nutrients from food, and occurs through two processes: mechanical and chemical digestion.
Organs of the Digestive System
The organs of the digestive system can be divided into upper and lower digestive tracts. The upper digestive tract consists of the esophagus, stomach, and the small intestine, while the lower tract includes all of the large intestine, the rectum, and anus.