The inner lining of the heart chambers is called which structure?

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Multiple Choice

The inner lining of the heart chambers is called which structure?

Explanation:
The inner lining of the heart chambers is the endocardium, a thin, smooth layer of endothelial tissue that lines the interior surfaces and covers the heart valves. This layer provides a frictionless surface for blood flow and is continuous with the lining of the blood vessels. In contrast, the muscular middle layer is the myocardium, the outer layer is the epicardium, and the pericardial sac surrounds the heart from outside.

The inner lining of the heart chambers is the endocardium, a thin, smooth layer of endothelial tissue that lines the interior surfaces and covers the heart valves. This layer provides a frictionless surface for blood flow and is continuous with the lining of the blood vessels. In contrast, the muscular middle layer is the myocardium, the outer layer is the epicardium, and the pericardial sac surrounds the heart from outside.

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