Tunica externa

Tunica externa
Tunica externa
	Section of a medium-sized artery.
Details
Part of	Wall of blood vessels
Identifiers
Latin	tunica externa, tunica adventitia
TA98	A12.0.00.017
TA2	3920
TH	H3.09.02.0.01009
	Anatomical terminology

The tunica externa (Neo-Latin "outer coat"), also known as the tunica adventitia (Neo-Latin "additional coat"),^[1]^[2] 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.

^ Cite error: The named reference :0 was invoked but never defined (see the help page).
^ Maleszewski, J. J.; Lai, C. K.; Veinot, J. P. (2016-01-01), Buja, L. Maximilian; Butany, Jagdish (eds.), "Chapter 1 - Anatomic Considerations and Examination of Cardiovascular Specimens (Excluding Devices)", Cardiovascular Pathology (Fourth Edition), San Diego: Academic Press, pp. 1–56, doi:10.1016/b978-0-12-420219-1.00001-x, ISBN 978-0-12-420219-1, retrieved 2020-12-29

[:0-1] Cite error: The named reference :0 was invoked but never defined (see the help page).

[:1-2] Maleszewski, J. J.; Lai, C. K.; Veinot, J. P. (2016-01-01), Buja, L. Maximilian; Butany, Jagdish (eds.), "Chapter 1 - Anatomic Considerations and Examination of Cardiovascular Specimens (Excluding Devices)", Cardiovascular Pathology (Fourth Edition), San Diego: Academic Press, pp. 1–56, doi:10.1016/b978-0-12-420219-1.00001-x, ISBN 978-0-12-420219-1, retrieved 2020-12-29

[1]

[2]