Which pairing between heart chamber and its primary circulation target is incorrect?

Which pairing between heart chamber and its primary circulation target is incorrect?

• A. Right Atrium — receives deoxygenated blood from systemic veins
• B. Left Atrium — receives oxygenated blood from the lungs
• C. Right Ventricle — pumps blood to the systemic circulation
• D. Left Ventricle — pumps blood to the systemic circulation

Answer: (C)

The main idea is that the heart has two separate circulation routes: the pulmonary circuit and the systemic circuit. The right side handles deoxygenated blood and feeds the lungs (pulmonary circulation), while the left side handles oxygenated blood and supplies the body (systemic circulation). The right atrium receives deoxygenated blood from the systemic veins, which is correct. The left atrium receives oxygenated blood from the lungs via the pulmonary veins, which is also correct. The left ventricle pumps blood to the systemic circulation, which is correct. The right ventricle, however, pumps blood to the pulmonary circulation, not the systemic circulation. That makes the pairing describing the right ventricle as pumping to the systemic circulation the incorrect one.

The main idea is that the heart has two separate circulation routes: the pulmonary circuit and the systemic circuit. The right side handles deoxygenated blood and feeds the lungs (pulmonary circulation), while the left side handles oxygenated blood and supplies the body (systemic circulation).

The right atrium receives deoxygenated blood from the systemic veins, which is correct. The left atrium receives oxygenated blood from the lungs via the pulmonary veins, which is also correct. The left ventricle pumps blood to the systemic circulation, which is correct. The right ventricle, however, pumps blood to the pulmonary circulation, not the systemic circulation. That makes the pairing describing the right ventricle as pumping to the systemic circulation the incorrect one.