How many walls does the human heart have?

1 Answer

One wall comprising three layers.


The heart is enclosed in a protective double-layered sheath called the pericardium, which contains fluid to lubricate the heart during the pumping action.

The outer wall of the heart is a thick wall comprising three layers: the outer epicardium, the middle myocardium, and the inner endocardium.

The epicardium, a serous layer, supplies the muscular myocardium with blood vessels and nerves.

The myocardium forms the actual cardiac muscle that contracts and expands to perform the functions of the heart.

The endocardium is a layer of squamous epithelium that lines the heart chambers and valves.