The heart wall muscle layer is known as the ____.

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Question

The heart wall muscle layer is known as the ____. ​

Quizplus · Accepted Answer

The myocardium is the middle and thickest layer of the heart wall, consisting mostly of cardiac muscle tissue. The epicardium is the outermost layer, the pericardium is the sac surrounding the heart, the endocardium is the inner lining of the heart chambers, and the endothelium is the single layer of cells lining the blood vessels.

The Heart Wall Muscle Layer Is Known as the ____