GENERAL HISTOLOGY

Detailed explanation-1: -Venules receive blood from capillaries. 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: -Just like the arterial system, three layers make up the vein walls. But unlike the arteries, the venous pressure is low. Veins are thin-walled and are less elastic.

Detailed explanation-3: -Blood pressure is lower in veins than capillaries, because there needs to be enough pressure in the capillaries to ensure the blood and oxygen is delivered to all the tissues and cells in the body.