Which cardiac chamber has the thinnest wall and why?
A) The right and left atria; they are low-pressure chambers that serve as storage units and conduits for blood.
B) The right and left atria; they are not directly involved in the preload, contractility, or afterload of the heart.
C) The left ventricle; the mean pressure of blood coming into this ventricle is from the lung, which has a low pressure.
D) The right ventricle; it pumps blood into the pulmonary capillaries, which have a lower pressure compared with the systemic circulation.

Question

Quizplus · Accepted Answer

The two atria have the thinnest walls because they are low-pressure chambers that serve as storage units and conduits for blood that is emptied into the ventricles.This selection is the only option that correctly identifies which heart chambers have the thinnest walls and why that helps cardiac function.

Which Cardiac Chamber Has the Thinnest Wall and Why