THORAX ABDOMEN AND PELVIS

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.

Detailed explanation-2: -In other words, in comparison to arteries, venules and veins withstand a much lower pressure from the blood that flows through them. Their walls are considerably thinner and their lumens are correspondingly larger in diameter, allowing more blood to flow with less vessel resistance.

Detailed explanation-3: -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-4: -Your main pulmonary artery and your aorta are the two great vessels that carry blood out of your heart. A crucial difference is that your pulmonary artery carries oxygen-poor (deoxygenated) blood, while your aorta carries oxygen-rich (oxygenated) blood.