2.3: Adaptations for transport in blood vessels Flashcards
1
Q
How does the blood move?
A
Artery > arteriole > capillary > venule > vein > back to heart.
2
Q
What does an artery do?
A
Take blood away from the heart.
3
Q
What do veins do?
A
Take blood into the heart.
4
Q
What do capillaries do?
A
They are the site of gas exchange and tissue fluid formation.
5
Q
What is the tunica externa?
A
Consists of collagen, prevents blood vessel from stretching so it can maintain high pressure.
6
Q
Why must the blood vessel be prevented from stretching?
A
So it can maintain a high pressure.
7
Q
The tunica media is..?
A
In the middle.
8
Q
The tunica intima is?
A
The inner.
9
Q
What are capillaries made of?
A
A single layer of endothelial cells.
10
Q
Due to being made of a single layer, capillaries have..?
A
A short diffusion path.
