PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Arteries
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Veins
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Capillaries
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Arterioles
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Detailed explanation-1: -Veins as Blood Reservoirs The large lumens and relatively thin walls of veins make them far more distensible than arteries; thus, they are said to be capacitance vessels.
Detailed explanation-2: -For example, the largest lumina in the human body are located in the intestines and aorta. Some examples of smaller lumina are ducts and channels traveling between organs including bile ducts, renal tubules, etc. The main characteristic of a lumen is its patency which means that it is open and unobstructed.
Detailed explanation-3: -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.