small intestine

Subdivision of digestive tract that connects the stomach to the large intestine and is where much of the digestion and absorption of food takes place (with the exception of ruminants). The mammalian small intestine is long and coiled and can be differentiated histologically into: duodenum, jejunem, ileum[WP,cjm,Kardong]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the small intestine is

Subdivision of digestive tract that connects the stomach to the large intestine and is where much of the digestion and absorption of food takes place (with the exception of ruminants). The mammalian small intestine is long and coiled and can be differentiated histologically into: duodenum, jejunem, ileum[WP,cjm,Kardong]. The atlas records it as a organ at the organ scale in the human body.

Where the small intestine is

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

What the small intestine connects to

The atlas records 34 typed relationships for it, across 9 kinds of connection. part of digestive system and intestine.

Supply and innervation

Arterial supply: right gastroepiploic artery and superior pancreaticoduodenal artery. Venous drainage: superior mesenteric vein.

Also called

Also recorded as small bowel, small intestine, anterior intestine, intestinum tenue and mid intestine. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002108, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: digestive system and intestine.
• A kind of: organ and subdivision of digestive tract.
• contains: crypt of Lieberkuhn of small intestine, duodeno-jejunal junction, duodenum, epithelium of small intestine, ileum and jejunum, and 13 more.
• contributes to morphology of: intestine, crypt of Lieberkuhn of small intestine, duodenum, ileum and jejunum.
• Supplied by: right gastroepiploic artery and superior pancreaticoduodenal artery.
• participates in: Digestion.
• produces: chyle.
• connects: ileocecal junction.

Questions

Where is the small intestine?

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

What does the small intestine connect to?

Part of: digestive system and intestine.

Is the small intestine 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.