What is the inner layer of the heart?

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Multiple Choice

What is the inner layer of the heart?

Explanation:
The inner layer of the heart is endocardium. The heart wall has three layers from inside to outside: endocardium lines the heart chambers and covers the heart valves, myocardium is the thick muscular layer that contracts to pump blood, and epicardium is the outer layer of the heart. The endocardium provides a smooth, low-friction surface for blood flow and is continuous with the lining of the blood vessels, which helps integrate the heart’s interior with the vascular system. The other terms describe the outer structures: the myocardium is the pumping muscle, the epicardium is the outer surface, and the pericardium is the surrounding sac.

The inner layer of the heart is endocardium. The heart wall has three layers from inside to outside: endocardium lines the heart chambers and covers the heart valves, myocardium is the thick muscular layer that contracts to pump blood, and epicardium is the outer layer of the heart. The endocardium provides a smooth, low-friction surface for blood flow and is continuous with the lining of the blood vessels, which helps integrate the heart’s interior with the vascular system. The other terms describe the outer structures: the myocardium is the pumping muscle, the epicardium is the outer surface, and the pericardium is the surrounding sac.

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