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Q96
(CAPF/2026)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
Which one of the following statements about arteries is not correct?
Result
Your answer:
—
·
Correct:
D
Explanation
Statement D is incorrect. Arteries carry blood away from the heart under high pressure, which requires them to have thick, muscular, and elastic walls to prevent bursting. In contrast, capillaries are the blood vessels with the thinnest walls (composed of only a single layer of endothelial cells) to facilitate the diffusion of gases and nutrients between blood and tissues.
The walls of arteries consist of three distinct layers:
- Tunica intima: The innermost layer made of simple squamous endothelium (Statement A is correct).
- Tunica media: The middle layer containing smooth muscle and elastic fibres, which is much thicker in arteries than in veins (Statement B is correct).
- Tunica externa: The outermost layer made of fibrous connective tissue with collagen fibres (Statement C is correct).
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