myocardium
The middle layer of the heart, comprised mainly of striated cardiac muscle fibers. Every claim on this page comes from the Leumas anatomy graph and carries its source.
What the myocardium is
The middle layer of the heart, comprised mainly of striated cardiac muscle fibers. The atlas records it as a tissue at the tissue scale in the human body.
Where the myocardium is
It sits in the thorax and trunk, within the muscular and cardiovascular systems. Positioned deliberately as part of this species body plan.
What the myocardium connects to
The atlas records 17 typed relationships for it, across 9 kinds of connection. part of heart and musculature of body.
Supply and innervation
Arterial supply: coronary artery, left coronary artery and right coronary artery. Venous drainage: cardiac vein.
Also called
Also recorded as heart myocardium, muscle of heart, cardiac muscle and heart muscle. Searching any of those names reaches this page.
Source
Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002349, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.
- Part of: heart and musculature of body.
- A kind of: layer of muscle tissue and organ component layer.
- Attaches to: epicardium and visceral serous pericardium.
- contains: conducting system of heart, cardiac muscle tissue of myocardium and trabecular layer of ventricle.
- Supplied by: coronary artery, left coronary artery and right coronary artery.
- subtype: myocardium of atrium and myocardium of ventricle.
- composed of: cardiac muscle tissue.
- Drained by: cardiac vein.
Questions
Where is the myocardium?
It sits in the thorax and trunk, within the muscular and cardiovascular systems. Positioned deliberately as part of this species body plan.
What does the myocardium connect to?
Part of: heart and musculature of body.
Is the myocardium 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.