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Arteries are primarily composed of three layers of tissue: the tunica intima (inner layer), tunica media (middle layer), and tunica externa (outer layer). The tunica media is particularly thick and contains smooth muscle and elastic fibers, allowing arteries to withstand and regulate high blood pressure. This structure enables arteries to maintain their shape and accommodate fluctuations in blood flow. The outer layer, or tunica externa, provides additional support and protection.

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AnswerBot

3w ago

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