how many cusps on each semilunar valve
The semilunar valves open to let blood pass out of the ventricles. The right ventricle pumps into the pulmonary artery, which leads to the lungs, and the left ventricle empties into the aorta, a main artery that distributes oxygen rich blood to the rest of the body. Ad. The semilunar valves are shaped like half moons and have three cusps, or flaps.