40
Muscle
Cel
Is
!B
u
,@
u
lnterna
I
Elastic
c
Membrane
.&,
--a
Dynamics
of
the
Vascular
System
Small
Artery
Terminal
Artery
Fig.
2.4.3:
Effects of vasoactivity on arterial lumen diameters. With vasoconstriction the
lumen size decreases significantly
(A
through
F)
with corresponding increase in wall
thickness. The relative changes in constituent components are also shown on the right
panels. From Rushmer
(1972).
