ileum

The portion of the small intestine that extends from the jejunum to the colon. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the ileum is

The portion of the small intestine that extends from the jejunum to the colon. The atlas records it as a organ at the organ scale in the human body.

Where the ileum is

It sits within the digestive system. Positioned deliberately as part of this species body plan.

What the ileum connects to

The atlas records 17 typed relationships for it, across 7 kinds of connection. part of small intestine.

Supply and innervation

Arterial supply: ileocolic artery and superior mesenteric artery. Venous drainage: ileal vein and ileocolic vein.

Also called

Also recorded as distal intestine, intestinum ileum, lower intestine and posterior intestine. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002116, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: small intestine.
• A kind of: subdivision of digestive tract.
• contains: crypt of Lieberkuhn of ileum, ileal epithelium, ileal mucosa, intestinal villus of ileum, Meckel's diverticulum and mesentery of ileum, and 2 more.
• flows to: large intestine and jejunum.
• Drained by: ileal vein and ileocolic vein.
• Supplied by: ileocolic artery and superior mesenteric artery.
• contributes to morphology of: small intestine.

Questions

Where is the ileum?

It sits within the digestive system. Positioned deliberately as part of this species body plan.

What does the ileum connect to?

Part of: small intestine.

Is the ileum the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.