PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following describes why the tunica media of the veins are thinner than their companion arteries?
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more proteins in the arteriolar end
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lower blood pressure in the venous system
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presence of deoxygenated blood
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presence of valves in the veins
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Explanation:
Detailed explanation-1: -The tunica media, which in an artery is composed of muscle and elastic fibres, is thinner in a vein and contains less muscle and elastic tissue, and proportionately more collagen fibres (collagen, a fibrous protein, is the main supporting element in connective tissue).
Detailed explanation-2: -Veins are also different than arteries when it comes to the thickness of their walls. Veins have thinner and less muscular walls. This is because veins have a lower level of pressure than arteries. So, their walls don’t need to be as thick to handle the pressure.
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