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
  • https://upload.wikimedia.org/wikipedia/commons/3/32/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
  • tunica adventitia
  • adventitia externa
  • tunica adventitia of vessel
has related synonym
  • tunica externa vasorum
  • external coat
  • tunica adventitia vasorum
id
  • UBERON:0005734