heart Flashcards
1
Q
what blood vessles have the thinnest walls
A
capillaries - small diffusion distance
2
Q
what blood vessles have the smallest lumen
A
artery - high pressure
3
Q
what blood vessels contain valves
A
veins - to keep blood flowing in the same direction
4
Q
why do veins have large lumen
A
to carry low pressure blood
5
Q
where do arteries take blood
A
away from the heart
6
Q
what are capillaries used for
A
gas exchange
