ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Capillaries
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Veins
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Venules
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Arteries
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Detailed explanation-1: -The great vessels of your heart have a wider lumen (opening) compared with your other arteries and veins. They need to be wider to accommodate the heavy volume of blood flow. Your aorta and pulmonary artery must also withstand forceful pressure from your heart’s pumping action.
Detailed explanation-2: -Arteries are more muscular and have smaller, rounder lumens (internal spaces) than veins. The artery lumen has a wavy endothelium, or inner lining, due to the configuration of elastic tissue beneath it.
Detailed explanation-3: -The walls of most blood vessels have three distinct layers: the tunica externa, the tunica media, and the tunica intima. These layers surround the lumen, the hollow interior through which blood flows.