ANATOMY

Detailed explanation-1: -The tricuspid valve ensures that blood flows from the right atrium to the right ventricle. It also prevents blood from flowing backward between those two chambers.

Detailed explanation-2: -Aortic valve: Allows blood to pass from the left ventricle to the aorta; prevents backflow of blood into the left ventricle.

Detailed explanation-3: -Heart valve flaps are also known as heart valve leaflets. The flaps, or leaflets, are composed of tissue. The flaps sole purpose is to open-and-close tightly to secure that blood flows through the heart in one direction.

Detailed explanation-4: -The blood passing through the veins is deoxygenated (except in pulmonary veins) and flows at a low pressure. It flows slow and steady against the direction of gravity. Therefore, veins have valves to prevent the backflow of blood.

Detailed explanation-5: -As a result, blood may leak from the ventricle back into the atrium. The backflow of blood is called regurgitation.