ANATOMY

Detailed explanation-1: -The valves open and close to help blood move along its path: Blood that needs oxygen flows from your body into the right atrium. It then flows through the tricuspid valve to the right ventricle. The right ventricle pumps the blood through the pulmonary valve and into your lungs, where it picks up oxygen.

Detailed explanation-2: -The valves prevent the backward flow of blood. These valves are actual flaps that are located on each end of the two ventricles (lower chambers of the heart). They act as one-way inlets of blood on one side of a ventricle and one-way outlets of blood on the other side of a ventricle.

Detailed explanation-3: -The semilunar valves are pocketlike structures attached at the point at which the pulmonary artery and the aorta leave the ventricles.

Detailed explanation-4: -Mitral Valve Separates the top left chamber (left atrium) from the bottom left chamber (left ventricle). Opens to allow blood to flow from the left atrium to the left ventricle.

Detailed explanation-5: -The pulmonary valve guards the orifice between the right ventricle and the pulmonary artery. The aortic valve protects the orifice between the left ventricle and the aorta.