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 ...

Food moves to the small intestine from the stomach, which absorbs water and some nutrients. Digestive enzymes from the liver and pancreas travel to the small intestine to aid this process.

Tourists visiting an unfamiliar city would have a hard time finding their way around if they were using nothing but a topological map, no matter how detailed. Most tourist maps, therefore, highlight ...