Which Layer of the Heart Allows It to Act as a Pump

Question

Which layer of the heart allows it to act as a pump?
A) Epicardium
B) Myocardium
C) Pericardium
D) Endocardium

Accepted Answer

The myocardium is the middle layer of the heart and is composed of muscle tissue. This layer is responsible for the contraction and relaxation of the heart, allowing it to act as a pump. The epicardium is the outer layer of the heart that provides protection and support, while the endocardium is the inner lining of the heart chambers and valves. The pericardium is the sac that surrounds and protects the heart.