Small Intestine Anatomy

Anatomy The small intestine is made up of thee sections, including the duodenum, the jejunum and the ileum. On its proximal (near) end, the small intestine—beginning with the duodenum—connects to the stomach. On its distal (far) end, the ileum—the last segment of the small intestine—connects to the large intestine (colon).

The small bowel (or small intestine) is the section of bowel between the stomach and the colon. It has distinctive mucosal folds, valvulae conniventes , and is made up of three functional units:

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.

This diagram with labels depicts and explains the details of Small Intestine Anatomy.

Small Intestine Anatomy



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