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.Continue Reading
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 four chambers of the heart are the right atrium, left atrium, right ventricle and left ventricle. The atria are the two upper chambers that receive blood from the veins. The ventricles are the two lower chambers that pump blood into the arteries.Full Answer >
The apex of the heart, consisting of the left ventricle, is responsible for regulating ventricular contraction and sending and receiving information signals from the heart's atrial nodes, according to About.com. The apex is also considered useful by medical professionals as one of the four most common listening areas.Full Answer >
The left ventricle is the main pumping chamber of the heart, and it is responsible for pumping oxygen-rich blood to the entire body, as stated by the American Heart Association. The human heart consists of four chambers: the right atrium, the right ventricle, the left atrium and the left ventricle. While each chamber has a unique function, they all work together to form a strong, hard-working pump.Full Answer >
When the aortic valve does not close completely between heartbeats and allows blood to flow back into the left ventricle, aortic valve regurgitation occurs, states WebMD. The regurgitation forces the heart to work harder to supply the body with enough blood.Full Answer >