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Cambridge IGCSE Biology

11Gas exchange in humans

Gas exchange in humans in Cambridge IGCSE Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Topic42 practice questions2 lessons

In this topic

Lessons

  • Inspired and expired air, and breathing during exercise

    18 min

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  • The breathing system and ventilation

    18 min

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Sample question

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Gas exchange in humans: sample question

1 mark

Which observation shows that expired air contains more carbon dioxide than inspired air?

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