The coronary sinus empties into which chamber?

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Multiple Choice

The coronary sinus empties into which chamber?

Explanation:
Blood from the heart muscle returns to the heart through the coronary veins and drains into the right atrium via the coronary sinus. The coronary sinus opens into the posterior wall of the right atrium, ensuring this venous return enters the same chamber that handles systemic venous blood. The other chambers have different roles—the left atrium receives oxygenated blood from the lungs, the right ventricle pumps into the pulmonary artery, and the aorta carries blood out to the body.

Blood from the heart muscle returns to the heart through the coronary veins and drains into the right atrium via the coronary sinus. The coronary sinus opens into the posterior wall of the right atrium, ensuring this venous return enters the same chamber that handles systemic venous blood. The other chambers have different roles—the left atrium receives oxygenated blood from the lungs, the right ventricle pumps into the pulmonary artery, and the aorta carries blood out to the body.

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