The outermost layer of a blood vessel, composed mainly of fibrous tissue. [ http://en.wikipedia.org/wiki/Tunica_externa_(vessels) https://www.worldcat.org/search?q=bn%3A0073040584 ]

This is just here as a test because I lose it

Term information

definition

The outermost layer of a blood vessel, composed mainly of fibrous tissue.

depicted by

Illu:artery.jpg

editor note

TODO - note terminological problems. WP says tunica external layer of blood vessel. FMA says tunica externa = adventitia, and is FMA adventitia covers other kinds of vessels. Here we opt for a lengthier name that attempts to disambiguate. There is no precise FMA equivalent, as FMA has tunica externa of arteries, veins, genital ducts etc as siblings

external definition

The outermost layer of a blood vessel, surrounding the tunica media. It is mainly composed of collagen. The collagen serves to anchor the blood vessel to nearby organs, giving it stability[Wikipedia:Tunica_externa_(vessels)].

has exact synonym

adventitia externa

tunica adventitia

tunica adventitia of vessel

has related synonym

external coat

tunica adventitia vasorum

tunica externa vasorum

id

UBERON:0005734