What is the outer connective tissue layer of blood vessels called?

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Multiple Choice

What is the outer connective tissue layer of blood vessels called?

Explanation:
The outermost connective tissue layer of blood vessels is the tunica externa, also called adventitia. This layer is mainly collagen fibers (with some elastic fibers) and serves to anchor the vessel to surrounding tissues and provide structural support. It surrounds the inner lining (tunica intima) and the middle muscular layer (tunica media). The inner lining is the tunica intima, and the middle layer is the tunica media. The aorta is a blood vessel, not a layer, and phlebitis is inflammation of a vein.

The outermost connective tissue layer of blood vessels is the tunica externa, also called adventitia. This layer is mainly collagen fibers (with some elastic fibers) and serves to anchor the vessel to surrounding tissues and provide structural support. It surrounds the inner lining (tunica intima) and the middle muscular layer (tunica media). The inner lining is the tunica intima, and the middle layer is the tunica media. The aorta is a blood vessel, not a layer, and phlebitis is inflammation of a vein.

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