Which vessel returns most of the venous blood from the heart to the right atrium?

Name: Which vessel returns most of the venous blood from the heart to the right atrium?
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Question

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The coronary sinus is the largest vein that returns most of the venous blood from the heart to the right atrium. It receives blood from several smaller veins draining the heart, including the great cardiac vein, the middle cardiac vein, the small cardiac vein, and the posterior vein of the left ventricle.

Which Vessel Returns Most of the Venous Blood from the Heart