veins Flashcards
1
Q
what type of blood do veins cary back to the heart
A
deoxygenated
2
Q
what do they facilitate
A
venus return
3
Q
what is venus return
A
return of deoxygenated blood to the heart
4
Q
veins have ______ walls and a _________ diameter
A
thin
large
5
Q
how quickly is the blood flowing
under what pressure is blood flowing
A
slow and low
6
Q
descibe what the contracting muscles do
A
they push the thin walls inwards therefore squeezing the blood back to the heart
7
Q
what are pocket valves function
A
they prevent the backflow of blood
