Which vessel is guarded by a semilunar valve at its base?

Name: Which vessel is guarded by a semilunar valve at its base?
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Question

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The pulmonary trunk is the vessel that is guarded by a semilunar valve at its base. This valve prevents the backflow of blood from the pulmonary artery into the right ventricle. The superior vena cava and pulmonary vein do not have semilunar valves at their bases, and the coronary sinus is not a vessel that exits the heart.

Which Vessel Is Guarded by a Semilunar Valve at Its