Which valve allows blood to exit the right ventricle?

Which valve allows blood to exit the right ventricle?

• A. Tricuspid valve
• B. Pulmonary semilunar valve
• C. Aortic valve
• D. Left AV (Bicuspid/Mitral) valve

Answer: (B)

What this question tests is knowing the outflow path of the right ventricle. The right ventricle sends blood into the pulmonary artery to go to the lungs, and the valve there—the pulmonary semilunar valve—opens to let that blood exit and closes to prevent backflow. The other valves have different roles: the tricuspid valve sits between the right atrium and right ventricle, controlling blood moving into the ventricle; the aortic valve sits at the left ventricle outflow to the aorta; the left AV valve (mitral) sits between the left atrium and left ventricle. So the valve that permits blood to exit the right ventricle is the pulmonary semilunar valve.

What this question tests is knowing the outflow path of the right ventricle. The right ventricle sends blood into the pulmonary artery to go to the lungs, and the valve there—the pulmonary semilunar valve—opens to let that blood exit and closes to prevent backflow.

The other valves have different roles: the tricuspid valve sits between the right atrium and right ventricle, controlling blood moving into the ventricle; the aortic valve sits at the left ventricle outflow to the aorta; the left AV valve (mitral) sits between the left atrium and left ventricle. So the valve that permits blood to exit the right ventricle is the pulmonary semilunar valve.