The great cardiac vein receives blood from which chambers of the heart?

• A. Left ventricle and right atrium
• B. Both ventricles and left atrium
• C. Right atrium and left ventricle
• D. Right atrium and right ventricle

Answer: (B)

The great cardiac vein is primarily responsible for draining blood from the heart's chambers, specifically collecting blood from the left ventricle and the left atrium. This vein runs alongside the anterior interventricular artery and is a significant vessel in the coronary venous system.

The left ventricle is crucial as it pumps oxygen-rich blood to the body, and the left atrium receives oxygenated blood from the pulmonary veins. Hence, the great cardiac vein collects deoxygenated blood from these two chambers, returning it to the coronary sinus, which then empties into the right atrium. This positioning and function make it vital for efficiently managing the heart's own blood supply after it has circulated through the myocardium.

In contrast, the other options present incorrect combinations of heart chambers regarding what the great cardiac vein drains. The vessel's specificity to the left atrium and left ventricle is essential for understanding its role in cardiac circulation and how it contrasts with veins draining other parts of the heart.