MEDICAL PHYSIOLOGY

Detailed explanation-1: -The valves prevent the backward flow of blood. Valves are actually flaps (leaflets) that act as one-way inlets for blood coming into a ventricle and one-way outlets for blood leaving a ventricle. Normal valves have 3 flaps (leaflets), except the mitral valve. It only has 2 flaps.

Detailed explanation-2: -Aortic Valve Separates the left ventricle from the aorta. Opens to allow blood to leave the heart from the left ventricle through the aorta and the body. Prevents the backflow of blood from the aorta to the left ventricle.

Detailed explanation-3: -Valves prevent backflow of blood from ventricles to atria when ventricles contract and from the blood vessels to the ventricles when the ventricles relax. These are the structures like doors which can open only in one direction.

Detailed explanation-4: -The pulmonary valve prevents blood from going backward from the pulmonary artery to the right ventricle. Mitral valve: This valve has two leaflets. They allow blood to flow from the lungs into the left atrium. And they prevent backward flow from the left ventricle to the left atrium.