endocardial cushion in dogs

The endocardial cushion is a specialized region of mesenchymal cells that will give rise to the heart septa and valves[GO]. Swellings of tissue present between the endocardial and myocardial cell layers that will give rise to the interstitial cells of the cardiac valves[ZFA]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the endocardial cushion is

The endocardial cushion is a specialized region of mesenchymal cells that will give rise to the heart septa and valves[GO]. Swellings of tissue present between the endocardial and myocardial cell layers that will give rise to the interstitial cells of the cardiac valves[ZFA]. The atlas records it as a tissue at the tissue scale in the dog.

Where the endocardial cushion is

It sits in the thorax and trunk, within the cardiovascular system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the endocardial cushion connects to

The atlas records 13 typed relationships for it, across 4 kinds of connection. part of embryo, endocardium and heart.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the endocardial cushion. 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 AV cushion, atrioventricular cushion, cardiac cushion, endocardial cushion tissue, atrioventricular canal cushion and endocardial cushions. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002062, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: embryo, endocardium and heart.
• A kind of: anatomical structure, cardiac mesenchyme, embryonic structure, mesenchyme and trunk mesenchyme.
• develops into: atrioventricular septum, atrioventricular valve, cardiac valve and sinoatrial valve.
• Develops from: neural crest.

Questions

Where is the endocardial cushion?

It sits in the thorax and trunk, within the cardiovascular system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the endocardial cushion connect to?

Part of: embryo, endocardium and heart.

Is the endocardial cushion 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.