Which Cardiac Chamber Has the Thinnest Wall and Why

question 50

Multiple Choice

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.

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