Which is the outermost layer of an artery?

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Multiple Choice

Which is the outermost layer of an artery?

Explanation:
Artery walls are organized into three concentric layers. The innermost lining is the endothelium, which forms part of the tunica intima. Surrounding that is the tunica media, made mainly of smooth muscle and elastic fibers. The outermost layer is the tunica externa (also called adventitia), a connective tissue sheath that anchors the vessel to surrounding tissues. Since the question asks for the outermost covering, tunica externa is the correct answer.

Artery walls are organized into three concentric layers. The innermost lining is the endothelium, which forms part of the tunica intima. Surrounding that is the tunica media, made mainly of smooth muscle and elastic fibers. The outermost layer is the tunica externa (also called adventitia), a connective tissue sheath that anchors the vessel to surrounding tissues. Since the question asks for the outermost covering, tunica externa is the correct answer.

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