HISTOLOGY
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Blood can flow freely through arteries because
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Arteries have only one layer of cells.
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Connective tissue pushes blood through arteries.
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Arteries are lined with smooth muscle.
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Arteries are lined with a layer of smooth epithelial cells.
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Explanation:
Detailed explanation-1: -Endothelial Cells Line All Blood Vessels The wall is lined by an exceedingly thin single sheet of endothelial cells, the endothelium, separated from the surrounding outer layers by a basal lamina.
Detailed explanation-2: -All blood vessels are lined by simple squamous epithelium called the endothelium. Examine the endothelial lining of the large artery and vein. At the level of the light microscope the cytoplasm is difficult to visualize the lining cells, however nuclei can be distinguished.
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