AP BIOLOGY

Detailed explanation-1: -There are four valves associated with the heart. The two atrioventricular valves, and the two semilunar valves. the two semilunar valves, the aortic and pulmonary, have a similar design, each consisting of a fibrous valve ring at the base of the vessel, with three leaflets, each occupying a third of closed valve.

Detailed explanation-2: -The aortic and pulmonic valves are known as the semilunar valves, whereas the tricuspid and mitral valves are referred to as the atrioventricular valves.

Detailed explanation-3: -Your aortic valve is one of two semilunar valves. Semilunar valves connect your heart ventricles (lower chambers) and arteries. Semilunar valves get their name from the crescent moon shape of the flaps that make up the valve.

Detailed explanation-4: -There are two types of semilunar valves: (1) the aortic valves and (2) the pulmonary valve.

Detailed explanation-5: -The semilunar valves are half-moon-shaped leaflets of endocardium and connective tissues, situated between the aorta and the left ventricle and between the pulmonary artery and the right ventricle. These valves permit blood to be forced into the arteries, but prevent backflow from the arteries into the ventricles.