Blood capillaries are made of
Correct answer: D. endothelium only.
- A. endothelium, connective tissue and muscle fibres
- B. endothelium and muscle fibres
- C. endothelium and connective tissue
- D. endothelium only.
Explanation
(d) : The wall of capillaries is very thin (usually less than one micron) and have numerous minute pores and made up of only endothelium. Exchange of material takes place between blood and tissue fluid across the endothelial membrane of capillaries through active diffusion.
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