adventitia

/ad-ven-tish-ee-uh, -tish-uh/US // ˌæd vɛnˈtɪʃ i ə, -ˈtɪʃ ə //UK // (ˌædvɛnˈtɪʃɪə, -ˈtɪʃə) //

阴阳师,阴阳人,阴阳界,阴谋论

Definitions

n.名词 noun

1
Anatomy.
- : the external covering of an organ or other structure, derived from connective tissue, especially the external covering of a blood vessel.

Up to the third decade there is only a strengthening of the media and adventitia.
The adventitia varies much in thickness, being better developed in the medium-sized than in the large arteries.
Coincidently with this, there is thickening by a connective tissue growth in the adventitia.
There is also, as a rule, rather pronounced hypertrophy of the adventitia.