Veins Take Blood Back to the Heart Flashcards
1
Q
Capillaries eventually join up to form?
A
Veins
2
Q
Why don’t the walls need to be as thick as artery walls?
A
Blood is at a lower pressure
3
Q
Why do they have a bigger lumen than arteries?
A
To help the blood flow despite the lower pressure
4
Q
Why do they have valves?
A
To help keep the blood flowing in the right direction
5
Q
What is the largest vein in the body?
A
Vena cava
