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The endocardium (pl.: endocardia) is the innermost layer of tissue that lines the chambers of the heart. Its cells are embryologically and biologically similar to the endothelial cells that line blood vessels. The endocardium also provides protection to the valves and heart chambers. [1]
4 sty 2024 · Structurally, the endocardium is comprised of loose connective tissue and simple squamous epithelial tissue – it is similar in its composition to the endothelium which lines the inside of blood vessels.
The endocardium has three components: a single layer of flat endothelial cells in direct contact with the blood-filled chamber, a dense inner connective tissue layer, and a loose outer connective tissue layer (Fig. 10.11). The last two layers are sometimes lumped together and referred to as the subendocardium.
It is composed of a layer of epithelial cells and a thin underneath layer of loose connective tissue that contains nerves and coronary blood vessels. The myocardium layer, the vast majority of heart tissue, lies between the endocardium and the epicardium and is composed of cardiac muscle.
3 lis 2023 · Endocardium. The endocardium is the innermost layer of the heart. It lines the inner surfaces of the heart chambers, including the heart valves. The endocardium has two layers. The inner layer lines the heart chambers and is made of endothelial cells.
The endocardium is a thin internal layer lining all cardiac cavities and continuous with the endothelium of the vessels. This fine smooth glistening membrane permits the blood to circulate easily inside the heart. A fold of endocardium forms the valvules of the orifices anchored on the fibrous skeleton, arising from the periorificial ring.
2 sty 2023 · The endocardium is composed of the endothelium and the subendothelial connective tissue layer. The subendocardium is between the endocardium and myocardium and contains the impulse-conducting system. The impulse-conducting system has specialized cardiac cells to conduct electrical impulses throughout the heart.
