endocardium in dogs

The endocardium is an anatomical structure comprised of an endothelium and an extracellular matrix that forms the innermost layer of tissue of the heart, and lines the heart chambers[GO]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the endocardium is

The endocardium is an anatomical structure comprised of an endothelium and an extracellular matrix that forms the innermost layer of tissue of the heart, and lines the heart chambers[GO]. The atlas records it as a tissue at the tissue scale in the dog.

Where the endocardium 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 endocardium connects to

The atlas records 11 typed relationships for it, across 6 kinds of connection. part of heart.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the endocardium. 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 endocardial lining, endocardial tissue, heart endocardium and heart endocardial tissue. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002165, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: heart.
• A kind of: anatomical structure, heart layer and tunica intima.
• Adjacent to: cardiac jelly, myocardium trabecular layer and subendocardium layer.
• subtype: endocardium of atrium and endocardium of ventricle.
• Develops from: primitive heart tube.
• contains: endocardial cushion.

Questions

Where is the endocardium?

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 endocardium connect to?

Part of: heart.

Is the endocardium 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.