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

• A. Pulmonary semilunar valve
• B. Aortic semilunar valve
• C. Pulmonary valve
• D. Mitral valve

Answer: (C)

Blood is pumped from a ventricle into a large artery through a semilunar valve that opens with systole and closes to prevent backflow. The valve between the right ventricle and the pulmonary trunk is the pulmonary valve, also called the pulmonary semilunar valve. It ensures flow toward the lungs and blocks blood from flowing back into the right ventricle during diastole. The other valves are in different locations: the aortic semilunar valve sits between the left ventricle and the aorta, and the mitral valve sits between the left atrium and left ventricle. Thus, the pulmonary valve is the correct choice.