Which circuit is responsible for pumping blood to the rest of the body?

The systemic circuit is responsible for pumping oxygenated blood from the heart to the rest of the body. This circuit begins when the left ventricle contracts, sending blood into the aorta, which branches out to distribute oxygen and nutrients to all body tissues. After delivering oxygen, blood returns deoxygenated to the right atrium of the heart via the superior and inferior vena cavae, completing the circuit.

In contrast, the pulmonary circuit is focused on transporting deoxygenated blood from the right side of the heart to the lungs for gas exchange, where it picks up oxygen and releases carbon dioxide. The coronary circuit supplies blood specifically to the heart muscle itself, ensuring it receives the necessary oxygen and nutrients to function effectively. The hepatic circuit pertains to blood flow to and from the liver for processing nutrients and detoxifying substances. Only the systemic circuit fulfills the body-wide distribution of oxygen-rich blood, confirming it as the correct choice.