The muscular layer of the heart wall is the

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The myocardium is the middle layer of the heart wall and is composed of cardiac muscle tissue, responsible for the contraction of the heart and the pumping of blood. The epicardium is the outer layer of the heart wall, while the endocardium is the innermost layer that lines the chambers and valves of the heart. The visceral epicardium refers to the outermost layer of the heart wall, which is also part of the epicardium.

The Muscular Layer of the Heart Wall Is the