Which of the events below does not occur when the semilunar valves are open?
A. Ventricles are in diastole.
B. Blood enters pulmonary arteries and the aorta.
C. AV valves are closed.
D. Ventricles are in systole.
Answer:A
Which of the events below does not occur when the semilunar valves are open?
A. Ventricles are in diastole. B. Blood enters pulmonary arteries and the aorta. C. AV valves are closed. D. Ventricles are in systole.