Human Bio Unit 1 - Capillaries, Veins and Arteries Flashcards
0
Q
Non pulsatile
A
Smooth flow of blood
1
Q
Vein
A
All carry blood to the heart
Non pulsatile
2
Q
Physical features of veins
A
Wide lumen
Not much muscle
Semilunar valves
Thin wall
Elastic
3
Q
Which part of the vein is the most ellastic?
A
The inside
4
Q
Roles of arteries
A
Carries blood away from the heart
5
Q
Physical features of arteries
A
Narrow lumen - higher pressure
Thick muscle wall
Highly elastic
6
Q
How does blood flow in arteries?
A
Pulsatile - in pulses
7
Q
Capplieries
A
Thin, one cell thick wall
Large surface area
Endothelium is continuos throughout
Large quantity
8
Q
How are capillaries well adapted for diffusion?
A
Large surface area
Thin, one cell thick wall
9
Q
Endothelium
A
Single layer of cells
Lines inside of blood vessels
Allows easy diffusion between lumen and the other layers or outside the vessel
