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Multiple Choice

Which valves are semilunar valves?

Semilunar valves are the valves at the exits of the ventricles, guarding the aorta and the pulmonary trunk. They open during ventricular systole to let blood flow into the arteries and snap shut during diastole to prevent backflow. The two semilunar valves are the aortic semilunar valve and the pulmonary semilunar valve. The other valves are atrioventricular valves (between atria and ventricles) and are not semilunar.

Semilunar valves are the valves at the exits of the ventricles, guarding the aorta and the pulmonary trunk. They open during ventricular systole to let blood flow into the arteries and snap shut during diastole to prevent backflow. The two semilunar valves are the aortic semilunar valve and the pulmonary semilunar valve. The other valves are atrioventricular valves (between atria and ventricles) and are not semilunar.