The Muscle Layer of the Heart is The

Question

The muscle layer of the heart is the
A) epicardium.
B) myocardium.
C) endocardium.
D) parietal pericardium.
E) mediastinum.

Accepted Answer

The myocardium is the middle and thickest layer of the heart wall, composed of cardiac muscle tissue that contracts to pump blood through the circulatory system.