NURSING ANM AND GNM

Detailed explanation-1: -The walls of the heart are composed of three layers: Epicardium-the outer layer. Myocardium-the middle, muscular layer. Endocardium-the inner layer.

Detailed explanation-2: -The epicardium is the outer layer that contains blood vessels. The myocardium is the middle layer that is composed of contractile tissues. The endocardium is the innermost layer and composes the valves, inner lining of the chambers, and contains vessels and nerves.

Detailed explanation-3: -The Heart Wall: The wall of the heart is composed of three layers, the thin outer epicardium, the thick middle myocardium, and the very thin inner endocardium.

Detailed explanation-4: -There are three recognized layers in the endocardium, which includes the endothelium with its basal lamina, the subendothelial layer, and the elastic layer (Figure 1.29a and b).