key term - Epicardium

Definition

The epicardium is the outermost layer of the heart's wall, consisting of a thin layer of connective tissue and fat that serves as a protective layer. It plays a crucial role in lubricating the heart to prevent friction during its contractions.

Related terms

Myocardium:

This is the thick middle layer of the heart wall composed of cardiac muscle fibers responsible for contracting and forcing blood out of the heart chambers.

Endocardium:

The innermost layer of the heart lining the chambers and valves, made up of a thin layer of endothelial cells that provides a smooth surface for blood to flow over with minimal resistance.

Pericardium:

A double-walled sac containing the heart and the roots of great vessels that provides protection and limits excessive movement of the heart within the thorax