Which valve is located between the right ventricle and the pulmonary artery?

• A. Atrioventricular Valves
• B. Semilunar Valves
• C. Papillary Muscles
• D. Chordae Tendinae

Answer: (B)

Understanding valve types and where they sit in the heart helps you answer this. Between the ventricles and the great arteries are the semilunar valves. The valve between the right ventricle and the pulmonary artery is the pulmonary semilunar valve, located right at the outlet of the right ventricle into the pulmonary trunk. It has three cusps and opens to let blood flow into the lungs, then closes to prevent backflow when the ventricle relaxes. The other terms refer to structures involved with the atrioventricular valves or their support (papillary muscles and chordae tendineae) and are not the valves at the heart’s outflow to the lungs. So the correct valve is the pulmonary semilunar valve.