What are the 3 layers of the heart?

What are the 3 layers of the heart?

• A. Endocardium, Myocardium, Epicardium
• B. Epidermis, Dermis, Subcutaneous
• C. Pericardium, Endocardium, Myocardium
• D. Atria, Ventricle, Septum

Answer: (A)

Three layers form the heart wall: endocardium, myocardium, and epicardium. The endocardium is the thin lining that covers the interior surfaces of the heart chambers and valves. The thick middle layer, the myocardium, is made of cardiac muscle and does the pumping. The outermost layer, the epicardium, covers the heart’s exterior and is the visceral layer of the pericardium. The pericardium itself surrounds the heart, but it’s not part of the heart wall, which is why this trio is the correct description. The other options mix in skin layers or refer to chambers, not walls, or replace epicardium with pericardium, which isn’t the correct layering.

Three layers form the heart wall: endocardium, myocardium, and epicardium. The endocardium is the thin lining that covers the interior surfaces of the heart chambers and valves. The thick middle layer, the myocardium, is made of cardiac muscle and does the pumping. The outermost layer, the epicardium, covers the heart’s exterior and is the visceral layer of the pericardium. The pericardium itself surrounds the heart, but it’s not part of the heart wall, which is why this trio is the correct description. The other options mix in skin layers or refer to chambers, not walls, or replace epicardium with pericardium, which isn’t the correct layering.