Which major vessel drains the musculature of the heart?

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Multiple Choice

Which major vessel drains the musculature of the heart?

Explanation:
The heart muscle is drained by the coronary venous system, which collects blood from the myocardium and empties it into the coronary sinus. The coronary veins—such as the great cardiac vein, middle cardiac vein, and small cardiac vein—converge into this large vein that runs in the posterior coronary sulcus. The coronary sinus then delivers the venous blood into the right atrium. This pattern is distinct from the superior and inferior vena cavae, which drain systemic blood into the right atrium, and from the pulmonary veins, which bring oxygenated blood from the lungs into the left atrium.

The heart muscle is drained by the coronary venous system, which collects blood from the myocardium and empties it into the coronary sinus. The coronary veins—such as the great cardiac vein, middle cardiac vein, and small cardiac vein—converge into this large vein that runs in the posterior coronary sulcus. The coronary sinus then delivers the venous blood into the right atrium. This pattern is distinct from the superior and inferior vena cavae, which drain systemic blood into the right atrium, and from the pulmonary veins, which bring oxygenated blood from the lungs into the left atrium.

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