A half-moon shaped valve located in the main arteries that prevents blood from flowing back into the heart ventricles.
Either of two valves in the heart, the pulmonary valve and the aortic valve, through which blood flows out of the ventricles.
Heart valve with half-moon-shaped cusps (semilunar), as the aortic valve or the pulmonary valve.
Half-moon-shaped valve between the heart and the aorta that prevents blood flow from the aorta into the left ventricle during ventricular relaxation.
Either of the two valves in the heart situated at the origin of the aorta and the pulmonary artery. Each consists of three flaps, which maintain the flow of blood in one direction.
The type of valve separating the heart and aorta and the heart and pulmonary artery.