The small intestine is made up of the duodenum, jejunum, and ileum. Together with the esophagus, large intestine, and the stomach, it forms the gastrointestinal tract. In living humans, the small ...

The small intestine plays a key role in digestion. Find out more about the organ's anatomy, function, and associated diseases.

The pyloric sphincter is a band of smooth muscle that plays an important role in moving the contents of your stomach into your small intestine. It also prevents partially digested food and stomach ...

The anatomy and function of the duodenum, the first part of the small intestine, is described in part 3 of this series on the GI tract. Having received acidic chyme from the stomach, the duodenum ...