THORAX ABDOMEN AND PELVIS

MEDICAL

HEART AND PERICARDIUM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
This chamber of the heart has the thickest myocardium because it has to pump blood to the entire body (not to the lungs).
A
Left ventricle
B
Right ventricle
C
Left atrium
D
Right atrium
Explanation: 

Detailed explanation-1: -The myocardium is thickest in the left ventricle, as the left ventricle must create a lot of pressure to pump blood into the aorta and throughout systemic circulation.

Detailed explanation-2: -The left ventricle pumps blood at higher pressures compared to the rest of the other heart chambers, as it faces a much higher workload and mechanical afterload. In comparison to that of the right ventricle, the free wall of the left ventricle is much thicker.

Detailed explanation-3: -The two ventricles (right and left) are muscular chambers capable of propelling the blood out of the heart. The right ventricle pumps blood to the lungs, and the left ventricle pumps blood to all other organs.

Detailed explanation-4: -The two atria are thin-walled chambers that receive blood from the veins. The two ventricles are thick-walled chambers that forcefully pump blood out of the heart.

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