When the atria of the heart are filled,which valves are closed?
A) atrioventricular
B) aortic
C) pulmonary
D) pulmonary and aortic
E) all of these valves are closed

Question

Quizplus · Accepted Answer

When the atria are filled, the atrioventricular valves (tricuspid and mitral) are open to allow blood to flow into the ventricles, while the semilunar valves (aortic and pulmonary) are closed to prevent backflow into the ventricles.

When the Atria of the Heart Are Filled,which Valves Are