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: -Arteries carry high pressure oxygen rich blood from the heart to the body’s organs and tissues. Veins carry low pressure, deoxygenated blood from the body’s organ and tissues back to the heart; from there it is pumped to the lungs to collect oxygen, and then pumped back to the body through the arteries.

Detailed explanation-3: -Blood Flow Like all fluids, blood flows from a high pressure area to a region with lower pressure. Blood flows in the same direction as the decreasing pressure gradient: arteries to capillaries to veins. The rate, or velocity, of blood flow varies inversely with the total cross-sectional area of the blood vessels.