NEET PG DENTAL EXAM

Detailed explanation-1: -Veins: Unlike arteries, veins don’t have to carry highly pressurized blood, but they do have to carry large volumes of deoxygenated blood back to your heart. Thin, less elastic walls help them handle high volumes and low pressure. Most veins have valves that open and close.

Detailed explanation-2: -What are Vein Valves? Interspersed throughout your veins are small crescent-shaped flaps of tissue, known as valves, that help prevent a backflow of blood. These valves project from the innermost layer of the vein wall to the center of the vein and are angled towards the heart in the direction of venous blood flow.

Detailed explanation-3: -Veins are blood vessels that carry oxygen-poor blood to your heart. Pulmonary veins are an exception because they carry oxygen-rich blood from your lungs to your heart. Veins in your legs fight gravity to push blood up toward your heart.

Detailed explanation-4: -Valves in veins are bicuspid, meaning they have two flap-like structures that regulate blood flow. These flaps are made of elastic tissue. The valves’ main job is to keep the blood moving in one direction – back up towards the heart.