The cells constituting walls of the blood capillaries are known as
A
Parietal cells
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B
Haemocytes
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C
Oxyntic cells
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D
Endothelial cells
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Solution
The correct option is D Endothelial cells
The capillaries are the terminal branches of the blood transport system. It has very thin endothelial lining for proper exchange of nutrients and gasses. The lumen of the capillaries is very small as blood flow is very slow here for maximum exchange process. The capillaries also lack thick muscular walls.