Item BF089002: Both oxygen molecules and carbon dioxide molecules move between the lungs and the blood through the walls of capillaries.

How does the functioning of the lungs affect the amount of oxygen and carbon dioxide in the blood?

  1. The lungs help increase the amount of oxygen and the amount of carbon dioxide in
    the blood.
  2. The lungs help increase the amount of oxygen and reduce the amount of carbon dioxide in the blood.
  3. The lungs help increase the amount of carbon dioxide and reduce the amount of oxygen in the blood.
  4. The lungs help reduce the amount of carbon dioxide and the amount of oxygen in
    the blood.

Statistics for this item are available in the Original Project.