Of the three layers of the heart wall, the layer that contains the cardiac muscle is the
A) epicardium.
B) visceral layer of serous pericardium.
C) myocardium.
D) endocardium.

Question

Quizplus · Accepted Answer

The myocardium is the middle and thickest layer of the heart wall, and it contains the cardiac muscle responsible for the contraction of the heart. The epicardium (A) is the outermost layer, the visceral layer of serous pericardium (B) is the innermost layer, and the endocardium (D) is the inner lining of the heart chambers.

Of the Three Layers of the Heart Wall, the Layer