24
Dynamics
of
the Vascular System
Adventi
tia
External
elastic lamina
nice
media
External elastic
lamin
Tunica media’
7
.Endo
Internal
elastic
lamina
Ithelium
Fig.
2.2.2:
Cross sections of the
artery
reveal three distinctive layers: the innermost tunica
intima, the thick tunica media, and the outermost adventitia. From Fawcett (1994).
Aorta
Artery
Sphhcter
Vcnule
%In
Veno
Covo
0
Ohtttr
25mm
4mm
30~
35p
8p
20p
Smm.
30mm.
Wall
Endofhetiurn
Elatlie
Muscle
Fibrous
Fig.
2.2.3:
Relative contents
of
endothelium, elastic and fibrous tissues, and smooth
muscle in different vessels. Large arteries have more elastic and
fibrous
tissues whole
smaller arteries have more smooth muscle in the tunica media. From Rushmer (1 972).
