Question

question 11 of 20
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which vessel does not supply the myocardium with blood?
coronary sinus
left coronary artery
circumflex branch
marginal branch
posterior interventricular branch

Explanation:

The coronary sinus is a venous structure that collects de - oxygenated blood from the myocardium and returns it to the right atrium, not a vessel that supplies blood to the myocardium. The left coronary artery, circumflex branch, marginal branch, and posterior interventricular branch are all arteries that supply oxygen - rich blood to the myocardium.

Answer:

A. coronary sinus