HISTOLOGY
BLOOD VESSELS
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Question
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Characteristics of Tunica Media
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Middle layer
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Thickest layer
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Contains Smooth muscle fibers
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Consists of Elastic & Collagen FIbers
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Muscle Fibers arranged circularly
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Explanation:
Detailed explanation-1: -The tunica media is composed chiefly of circumferentially arranged smooth muscle cells. Again, the external elastic lamina often separates the tunica media from the tunica adventitia. Finally, the tunica adventitia is primarily composed of loose connective tissue made up of fibroblasts and associated collagen fibers.
Detailed explanation-2: -The arterial tunica media primarily consists of multiple layers of circumferentially oriented SMCs and ECM, including collagen, elastin (ELN), and proteoglycans. The ECM provides structural support as well as elasticity to the blood vessel.
Detailed explanation-3: -Muscular arteries contain more smooth muscle cells in the tunica media layer than the elastic arteries.
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