A

David

Darling

endocardium

The layers of the heart wall including the innermost endocardium

The layers of the heart wall including the innermost endocardium.


The endocardium is the thin serous membrane, made of endothelial cells, that lines the inner wall of the heart. It also covers the arteries, veins and valves. The cusps of the valves are formed from folds of the endocardium.