The right ventricle contracts next, which forces blood up through the pulmonary semilunar valve, which is also known as the pulmonary valve. One of the four valves that regulate blood flow in the heart is the pulmonary valve. It is situated between the artery that supplies blood to the lungs and the lower right heart chamber.
The pulmonary valve typically functions as a one-way door from the right ventricle of the heart to the lungs. The pulmonary valve allows blood to go from the right ventricle to the pulmonary artery, where it picks up oxygen before entering the lungs and carrying it to the rest of your body.
