pericardial sac

A double-walled sac containing the heart and the roots of the great vessels. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the pericardial sac is

A double-walled sac containing the heart and the roots of the great vessels. The atlas records it as a organ at the organ scale in the human body.

Where the pericardial sac is

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

What the pericardial sac connects to

The atlas records 8 typed relationships for it, across 4 kinds of connection. part of pericardium and thoracic segment of trunk.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the pericardial 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 pericardium. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002406, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: pericardium and thoracic segment of trunk.
• A kind of: anatomical system, serous sac and trunk region element.
• Attaches to: wall of heart.
• contains: pericardial cavity and serous pericardium.

Questions

Where is the pericardial sac?

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

What does the pericardial sac connect to?

Part of: pericardium and thoracic segment of trunk.

Is the pericardial sac 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.