The muscular layer of the heart wall, responsible for its contraction, is the
Correct answer: C. myocardium
- A. epicardium
- B. pericardium
- C. myocardium
- D. endocardium
Explanation
The myocardium is cardiac muscle supplied by the coronary arteries, and its death during a heart attack is what damages the pump. The endocardium lines the chambers and the epicardium is the outer surface.
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About Human Heart
The human heart is a four chambered muscular pump that maintains double circulation through the pulmonary and systemic circuits. Questions cover atria, ventricles, valves, major blood vessels, the cardiac cycle, pressure changes, the conduction system and ECG, while distinguishing arteries and veins from the chambers that receive or eject blood.
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