Blood returning from the lungs enters which heart chamber?

Blood returning from the lungs enters which heart chamber?

• A. Right Atrium
• B. Aorta
• C. Left Atrium
• D. Left Ventricle

Answer: (C)

Blood returning from the lungs is oxygen-rich and reaches the heart via the pulmonary veins, entering the left atrium. The left atrium serves as the receiving chamber for oxygenated blood before it moves through the mitral valve into the left ventricle and is then pumped out to the body via the aorta. This contrasts with the right atrium, which receives deoxygenated blood from the body, and the left ventricle, which sends blood to the systemic circulation. The lungs feeding the left atrium is the key idea, since the pulmonary circulation returns blood to the heart on the left side.

Blood returning from the lungs is oxygen-rich and reaches the heart via the pulmonary veins, entering the left atrium. The left atrium serves as the receiving chamber for oxygenated blood before it moves through the mitral valve into the left ventricle and is then pumped out to the body via the aorta. This contrasts with the right atrium, which receives deoxygenated blood from the body, and the left ventricle, which sends blood to the systemic circulation. The lungs feeding the left atrium is the key idea, since the pulmonary circulation returns blood to the heart on the left side.