Circulatory System

Blood Vessels

• Arteries

         - Carry blood away from the heart

• Capillaries 

        - Exchange nutrients and oxygen with the tissues

• Veins

        - Carry the blood back to the heart

Arteries

• Blood will be at high pressures

        - Just been pumped out to the ventricles

        -  Need to be strong and elastic

• Thick layer…