cardiac atrium

Cardiac chamber in which blood enters the heart. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the cardiac atrium is

Cardiac chamber in which blood enters the heart. The atlas records it as a organ at the organ scale in the human body.

Where the cardiac atrium is

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

What the cardiac atrium connects to

The atlas records 20 typed relationships for it, across 7 kinds of connection. a kind of anatomical structure and cardiac chamber.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the cardiac atrium. 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 atria, atrium, atrium of heart, cardiac atria, heart atrium and atrial tissue. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002081, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: anatomical structure and cardiac chamber.
• Adjacent to: cardiac skeleton.
• contains: atrium auricular region, cardiac muscle tissue of atrium, endocardium of atrium, myocardium of atrium, outflow tract of atrium and right atrium endocardium.
• contributes to morphology of: heart, atrium auricular region, endocardium of atrium and myocardium of atrium.
• connects: atrioventricular canal, atrioventricular region, atrioventricular valve and sinoatrial valve.
• subtype: left cardiac atrium and right cardiac atrium.
• Develops from: future cardiac atrium.

Questions

Where is the cardiac atrium?

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

What does the cardiac atrium connect to?

A kind of: anatomical structure and cardiac chamber.

Is the cardiac atrium 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.