Which of the following chambers of the heart pumps oxygenated blood to the rest of the body during the cardiac cycle?

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BlackTom AI · Accepted Answer

To begin, consider the basic divisions of the heart and the role each chamber plays in circulating blood.
Option a: Left atrium. The left atrium receives oxygenated blood from the pulmonary veins, but it does not pump blood to the body; it passes blood to the left ventricle for systemic distribution.
Option b: Left ventricle. This chamber is responsible for pumping oxygenated blood into the aorta and throughout the systemic circulation to supply the body. It generates the highest pressure to drive blood flow to distant tissues, making this the correct choice.
Option c: Right ventricle. The right ventricle pumps deoxygenated blood to the lungs via the pulmonary artery for oxygenation, not to the rest of the body. Its function is pulmonary circulation rather than systemic.
Option d: Right atrium. The right atrium collects deoxygenated blood from the body via the superior and inferior vena cavae and then moves it to the right ventricle; it does not send blood to the body.
In summary, the left ventricle is the chamber that delivers oxygen-rich blood to the systemic circulation, whereas the other chambers have roles in receiving blood or handling pulmonary circulation, not systemic outflow.

BIO 181 (001&002) FALL 2025 4B - Self-Check: Circulatory System: Cardiac Cycle (LO 4B.1, 4B.2, 4B.3)

Which of the following chambers of the heart pumps oxygenated blood to the rest of the body during the cardiac cycle?

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