1.1 - Blood vessels Flashcards
1
Q
What are all 3 vessels made up of, in varying amounts
And what are their roles
A
- Collagen - strengthens vessles
- Elastic fibres - allow for stretch/recoil.
- Smooth muslce - allow for contraction, dilation
2
Q
Why do arteries have more of collagen, fibres and muscle?
A
To allow for higher blood pressure
3
Q
What is unique about veins
A
They have semilunar valves to prevent backflow
4
Q
Strucure of capillary
A
1 cell thick allow for diffusion between blood and cells
5
Q
A
