The coronary sinus returns blood to which chamber of the heart?

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Multiple Choice

The coronary sinus returns blood to which chamber of the heart?

Explanation:
The heart’s venous blood from the myocardium returns to the right atrium through the coronary sinus. This large venous channel collects most of the blood from the heart’s veins and delivers it into the right atrium, which is the chamber that receives systemic venous return. From there, blood moves to the right ventricle and onward to the lungs, continuing the circulation. The left atrium receives oxygenated blood from the lungs, not venous drainage from the heart muscle. The right and left ventricles are pumping chambers that send blood to the lungs and the rest of the body, respectively, and do not receive the coronary venous return directly.

The heart’s venous blood from the myocardium returns to the right atrium through the coronary sinus. This large venous channel collects most of the blood from the heart’s veins and delivers it into the right atrium, which is the chamber that receives systemic venous return. From there, blood moves to the right ventricle and onward to the lungs, continuing the circulation.

The left atrium receives oxygenated blood from the lungs, not venous drainage from the heart muscle. The right and left ventricles are pumping chambers that send blood to the lungs and the rest of the body, respectively, and do not receive the coronary venous return directly.

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