Pulmonary valve

This valve is located between the right ventricle and the outlet of the Pulmonary artery.

It should stay widely open during the ventricular systole to enable voiding of the right ventricle into the Pulmonary artery.

During diastole, when pressure in the ventricle decreases, this valve must be closed to prevent back flow (regurgitation) of blood from the pulmonary artery in the direction of the ventricle.