Download - Artery vs Vein Table
Arteries Veinsover-all diameter less greater
lumen smaller largerwall thicker; more rigid thinner; less rigid
relationship of diameter of lumen→the thickness of
the wall
less *except in large arteries
relatively larger lumen(?)
3 coatsbetter demarcated &distinguishable
often lack distinct boundaries
tunica intima relatively thicker relatively thinner
internal elastic membrane presentpresent only in bigger veins; never prominent
smooth muscles&elastic tissue
better supplied
lesser amount; prominent only in larger veins; fibrous (collagenous) tissue occurs in much greater quantities
thickest coat tunica media tunica adventitia
relationship of TATM
thinner *except in med-sized
arteries=equal/almost equal
valves X
*esp those of the lower extremities to prevent backflow of blood
vasa vasorum fewermore; extend more deeply through the media&into
the TI
blood flowmore rapid;under high
pressureslower; under low
pressure
nourishment of cells of inner layers of wall
diffusion mechanisms-operate over long
distances
diffusion mechanisms-operate only over short
distances