Coursebook questions - page 44
Questions
1 Name the red pigment inside red blood cells that helps to carry oxygen,
2 Name the large blood vessel that carries blood from the heart to the lungs.
3 Using what you know about particle theory, explain how oxygen diffuses
from an air sac into the blood.
4 The walls of the air sacs and the capillaries are both very thin. Suggest
how this helps gas exchange to take place quickly.
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