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Qu'est-ce (qui) est tunica adventitia - définition
OUTER LAYER OF BLOOD VESSEL
Tunica adventitia; Adventitia externa; External coat; Tunica adventitia (vessels); Tunica externa vasorum; Tunica adventitia vasorum; Tunica externa (vessels)
![Transverse section through a small [[artery]] and [[vein]] of the [[mucous membrane]] of the [[epiglottis]] of a child. (Tunica adventitia is at 'a')](https://commons.wikimedia.org/wiki/Special:FilePath/Gray448.png?width=200 "Transverse section through a small [[artery]] and [[vein]] of the [[mucous membrane]] of the [[epiglottis]] of a child. (Tunica adventitia is at 'a')")
Tunica externa
The tunica externa (New Latin "outer coat"), also known as the tunica adventitia (New Latin "additional coat"), 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.
adventitia
OUTER LAYER OF FIBROUS CONNECTIVE TISSUE SURROUNDING AN ORGAN, VESSEL, OR OTHER STRUCTURE
Adventitial
[?adv?n't???]
¦ noun the outermost layer of the wall of a blood vessel.
Derivatives
adventitial adjective
Origin
C19: shortening of mod. L. tunica adventitia 'additional sheath'.
intima
INNER LAYER OF BLOOD VESSEL
Intima; Intimae; Tunicae intimae; Fenestrated membrane; Inner coat; Internal coat; Intimal; Inner layer; Tunica interna
['?nt?m?]
¦ noun (plural intimae -mi:) Anatomy & Zoology the innermost membrane of a vein, artery, or other participle
Derivatives
intimal adjective
Origin
C19: shortening of mod. L. tunica intima 'innermost sheath'.
Wikipédia
Tunica externa
The tunica externa (New Latin "outer coat"), also known as the tunica adventitia (New Latin "additional coat"), 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.
The three layers of the blood vessels are: an inner tunica intima, a middle tunica media, and an outer tunica externa.
