What is the middle layer of an artery called?

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Multiple Choice

What is the middle layer of an artery called?

Explanation:
Arteries have three layers. The middle layer is the tunica media, and it’s made mainly of smooth muscle fibers with elastic fibers. This muscular layer lets the artery constrict or dilate, which directly regulates blood flow and helps maintain blood pressure as the heart pulses. The inner lining, the tunica intima, includes the endothelial cells that contact the blood, while the outer layer, the tunica externa (adventitia), is a connective tissue coat that provides support and anchors the vessel. The thick, muscle-rich tunica media is what gives arteries their ability to withstand and adjust to high-pressure blood flow.

Arteries have three layers. The middle layer is the tunica media, and it’s made mainly of smooth muscle fibers with elastic fibers. This muscular layer lets the artery constrict or dilate, which directly regulates blood flow and helps maintain blood pressure as the heart pulses. The inner lining, the tunica intima, includes the endothelial cells that contact the blood, while the outer layer, the tunica externa (adventitia), is a connective tissue coat that provides support and anchors the vessel. The thick, muscle-rich tunica media is what gives arteries their ability to withstand and adjust to high-pressure blood flow.

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