This story is part of a series exploring human anatomy and physiology complexities. Each story in this collection showcases discoveries reshaping our understanding of the body's inner workings, ...

This article – the third in a six-part series on the gastrointestinal tract – describes chemical digestion in the duodenum and the role by the liver and pancreas in this process. It also discusses ...

A duodenal ulcer is a type of peptic ulcer that can appear in the duodenum. The duodenum is the upper part of the small intestine that’s connected directly to the stomach where it empties into the ...