Small intestine anatomy

Also known as: bowel, gut, duodenum, jejunum, ileum

Duodenum, jejunum and ileum: about six metres where most digestion and absorption happens.

Open in the 3D explorer Locate structures Quiz: digestive

3D model of the Small intestine in the Anatomy Nexus anatomy atlas — Interactive 3D model: Small intestine. Orbit, zoom and click the structures.Load the 3D model

Overview page. A full anatomy article for the small intestine has not been written yet; below are the modelled structures, the system it belongs to and every clinical topic that mentions it.

Structures in the atlas 9

The modelled pieces that make up the small intestine in the 3D atlas. Each opens in the explorer.

The digestive in brief

The digestive tract is a nine-metre tube from mouth to anus. Food is chewed, swallowed down the oesophagus, churned with acid in the stomach, digested and absorbed along the small intestine (duodenum, jejunum, ileum), and its residue concentrated in the colon. The liver, gallbladder and pancreas pour bile and enzymes into the duodenum. The model includes the tongue, salivary glands and gums, the stomach and intestines in many segments, the liver as eight hepatovenous segments with its bile ducts, the gallbladder, the pancreas and the mesenteries that suspend the gut.

All structures of the digestive