HISTOLOGY
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many layers of cells make up the wall of a capillary?
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1
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2
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3
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4
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Explanation:
Detailed explanation-1: -Capillary walls consist of a single layer of flattened endothelial cells, the endothelia, and these cells constitute the barrier between the blood and the ISF.
Detailed explanation-2: -Explanation: Capillaries are one cell thick so that diffusion of gases and other substances like urea, nutrients, water, etc becomes easier.
Detailed explanation-3: -Capillaries measure 5-10 m in diameter and are only one cell thick. Capillaries connect arterioles and venules and enable the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and surrounding tissues.
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