Capillaries cell walls are described as ______.

What are capillaries?

What does the capillary network do?

How thick is the capillary wall?

What is the purpose of capillaries having a thin cell wall?

What are capillary beds?

What happens to small molecules when blood passes through the capillaries?

What do the small molecules forced out of the capillaries when blood flows through them form?

What is tissue fluid?

Oxygen, water and glucose can be diffused from the tissue fluid to where?

Chemicals can also diffuses out of cells into the tissue fluid. Give an example.

What are the purpose of arteries?

Describe the structure of an artery.

What are veins?

Describe the structure of veins.

What blood vessel joins arteries to veins?