lesser omentum

The double layer of peritoneum that extends from the liver to the lesser curvature of the stomach and the start of the duodenum. [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the lesser omentum is

The double layer of peritoneum that extends from the liver to the lesser curvature of the stomach and the start of the duodenum. [WP,unvetted]. The atlas records it as a organ at the organ scale in the human body.

Where the lesser omentum is

It sits in the abdomen and trunk, within the digestive system. Positioned deliberately as part of this species body plan.

What the lesser omentum connects to

The atlas records 11 typed relationships for it, across 3 kinds of connection. part of alimentary part of gastrointestinal system, embryonic structure and stomach, and 1 more.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the lesser omentum. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as gastrohepatic omentum, omentum minus and small omentum. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002399, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: alimentary part of gastrointestinal system, embryonic structure, stomach and visceral peritoneum.
• A kind of: anatomical structure, mesentery, omentum, serous membrane and zone of stomach.
• contains: hepatoduodenal ligament and hepatogastric ligament.

Questions

Where is the lesser omentum?

It sits in the abdomen and trunk, within the digestive system. Positioned deliberately as part of this species body plan.

What does the lesser omentum connect to?

Part of: alimentary part of gastrointestinal system, embryonic structure, stomach and visceral peritoneum.

Is the lesser omentum 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.