Tunica externa

（重定向自External coat）

The tunica externa (New Latin "outer coat"), also known as the tunica adventitia (or adventitia for short), is the outermost tunica (layer) of a blood vessel, surrounding the tunica media. It is mainly composed of collagen and, in arteries, is supported by external elastic lamina. The collagen serves to anchor the blood vessel to nearby organs, giving it stability.

单词	External coat
释义	External coat 英语百科 Tunica externa （重定向自External coat） The tunica externa (New Latin "outer coat"), also known as the tunica adventitia (or adventitia for short), is the outermost tunica (layer) of a blood vessel, surrounding the tunica media. It is mainly composed of collagen and, in arteries, is supported by external elastic lamina. The collagen serves to anchor the blood vessel to nearby organs, giving it stability.
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