The aortic semilunar valve prevents the backflow of blood when the left ventricle of the heart is returning to the relaxed state after pumping. The aorta is the largest artery in the body, and despite its size, is under high pressure. The pumping of the left ventricle, the largest chamber of the heart, exceeds the pressure in the aorta forcing blood in, but when it stops, aortic pressure is greater.Know More
The aortic semilunar valve has three cusps, and it is constructed from tough fibrous proteins. It works automatically and is constructed to allow blood flow in one direction but is pushed shut when it begins flowing in the other, according to Boundless. The aorta is the first, largest artery that carries the oxygenated blood that travels everywhere in the body. The left ventricle produces enough pressure to force blood along the aorta, but in order to be refilled from the left atrium, which receives oxygenated blood from the lungs, its internal pressure must drop. Without the aortic semilunar valve, much of the blood the left ventricle pumped into the aorta would flow back into the ventricle when it relaxes.
The aortic semilunar valve is similar to the pulmonary valve, which also has three cusps and serves the same function, except that it serves the right ventricle and pulmonary artery.Learn more about Organs
The function of the two semilunar valves of the heart, the aortic valve and the pulmonary valve, is to allow blood to be forced into the arteries from the ventricles and to prevent blood from flowing back from the arteries into the ventricles. The closure of these two valves creates the second heart sound of a heartbeat.Full Answer >
The left ventricle of the heart pumps oxygenated to the organs of the body. The ventricular septum keeps the left and right ventricles separate. The left ventricle is the more muscular of the two ventricles.Full Answer >
The tricuspid valve is the flaplike structure that separates the right atrium of the heart from the right ventricle, according to About. This valve opens with each stroke to permit blood flow from the atrium to the ventricle. Afterwards, it closes to prevent backflow into the atrium.Full Answer >
The primary function of the pyloric valve is to impede undigested or large food particles from entering the intestine. It is a cone-shaped valve that connects the end of the stomach to the start of the small intestine.Full Answer >