lesser sac in dogs

The lesser sac, also known as the omental bursa, is the cavity in the abdomen that is formed by the lesser and greater omentum. Usually found in mammals, it is connected with the greater sac via the epiploic foramen (also known as the Foramen of Winslow). [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the lesser sac is

The lesser sac, also known as the omental bursa, is the cavity in the abdomen that is formed by the lesser and greater omentum. Usually found in mammals, it is connected with the greater sac via the epiploic foramen (also known as the Foramen of Winslow). [WP,unvetted]. The atlas records it as a organ at the organ scale in the dog.

Where the lesser sac is

It sits in the trunk. Only the region is known. The position shown is somewhere plausible inside it and nothing more.

What the lesser sac connects to

The atlas records 8 typed relationships for it, across 4 kinds of connection. part of organ.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the lesser sac. 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 bursa omentalis and omental bursa. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001341, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: organ.
• A kind of: anatomical structure, organ and viscus.
• contains: inferior recess of lesser sac, left subhepatic recess and superior recess of lesser sac.
• located in: peritoneal cavity.

Questions

Where is the lesser sac?

It sits in the trunk. Only the region is known. The position shown is somewhere plausible inside it and nothing more.

What does the lesser sac connect to?

Part of: organ.

Is the lesser sac the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.