PATHOLOGY MCQ
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following has walls that are one cell thick and is a site for diffusion?
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Vein
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Artery
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Capillary
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Aorta
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Explanation:
Detailed explanation-1: -Blood capillaries are the smallest vessels and are only one cell thick. Hence, exchange of materials can easily occur by diffusion across the membranes of blood capillaries.
Detailed explanation-2: -Capillaries have a very thin walls. The main function of capillaries is to transport digested food, oxygen, and other materials to all the cells of the body. Hence, their walls are thin, so that the substances can get in and out of them easily by diffusion.
Detailed explanation-3: -Capillaries are one cell thick so that diffusion of gases and other substances like urea, nutrients, water, etc becomes easier.
There is 1 question to complete.