Blood vessels- Yr 9

What is a blood vessel?

The network of tubes through which blood is pumped around the body

What are the three types of blood vessels?

Veins, capillaries and arteries

What does a vein do?

Transports deoxygenated blood back to your heart

What does a capillary do?

Delivers 02 and nutrients to cells while waste products, such as CO2 from respiration, are taken away

What does an artery do?

Carries oxygenated blood from heart

Adaptations for blood vessels:

Capillaries	Vein	Artery
One cell thick for easy diffusion	Wide hole (lumen) to transport more blood	Elastic layer due to high blood pressure
Oxygenated and deoxygenated blood	Valves to go against gravity and prevent backflow	Oxygenated blood

Where do arteries carry blood to/away from?

Away from the heart

Where do veins carry blood to/ away from?

Carries blood to the heart

Where do capillaries carry blood to/ away from?

Carries blood between cells

Do arteries carry oxygen rich or oxygen poor blood to cells?

Oxygen rich to cells

Do arteries carry oxygen rich or oxygen poor blood from cells?

Carries oxygen poor blood from cells

What size is each blood vessels’ lumen?

Arteries —> small lumen

Veins —> large lumen

Capillaries —> tiny vessel with narrow lumen