The vascular wall consists of several layers known as the tunica adventitia, tunica media, and tunica intima.
From the en.wikipedia.org
The thick outermost layer of a vein is made of connective tissue, called tunica adventitia or tunica externa.
From the en.wikipedia.org
The adventitia of these vessels and its population of myofibroblasts, in particular, are intimately involved in mediating their dynamic tonicity.
From the nature.com
If a dissecting aortic aneurysm ruptures through the adventitia, this can result in massive hemorrhage and exsanguination in a matter of minutes.
From the en.wikipedia.org
In addition to inflammatory rheumatic disease, current smoking was independently associated with more pronounced chronic inflammatory infiltration in the inner adventitia.
From the sciencedaily.com
More examples
Tunic: an enveloping or covering membrane or layer of body tissue
(adventitial) of or pertaining to the adventitia
The outermost layer of epithelial tissue encasing a visceral organ
The outer layer of the arteries containing nerves and blood vessels.