Gas Exchange

Biology: AQA GCSE Higher, topic 2.3.9

Test yourself on Gas Exchange

  • Gas Exchange in the Lungs

  • Why does deoxygenated blood pass through the lungs before returning to the heart?

  • What happens to oxygen and carbon dioxide in the capillaries that surround the alveoli?

  • Why are the alveoli surrounded by a network of capillaries?

  • What would happen to gas exchange in the alveoli if a person's bronchioles became completely blocked?

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