Exchange surfaces and gas exchange

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Question 4
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Gas exchange occurs across the specialised exchange surfaces inside the human lungs.

A diagram showing a single alveolus next to a pulmonary capillary. There are two arrows representing gaseous exchange: Arrow A points from the air space inside the alveolus into the blood capillary containing red blood cells. Arrow B points from the capillary blood flow back into the alveolar air space.

Name the waste gas produced during aerobic respiration, indicated by Arrow B, which diffuses from the blood capillary into the alveolus to be exhaled from the body.

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Exchange surfaces and gas exchange Questions

  1. GCSE
  2. /Biology
  3. /Exchange surfaces and gas exchange