In the diagram,which labeled structures are atrioventricular valves?

Question

Quizplus · Accepted Answer

The labeled structures B (tricuspid valve) and D (mitral valve) are both atrioventricular valves, which are responsible for preventing backflow of blood into the atria when the ventricles contract. Structures A (pulmonary semilunar valve) and C (aortic semilunar valve) are semilunar valves, which are responsible for preventing backflow of blood into the ventricles when they relax. Therefore, the best choice is D.

In the Diagram,which Labeled Structures Are Atrioventricular Valves