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CAIE IGCSE Biology 11.1.1 Features of Gas Exchange Surfaces Questions

Practise explaining how alveoli provide a large, thin, ventilated and well-perfused surface for rapid diffusion.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • identify alveoli as the human gas exchange surface
  • link large alveolar area and one-cell-thick walls to a short diffusion distance
  • identify good ventilation and capillary supply as features of an effective alveolar gas-exchange surface

CAIE IGCSE Biology 11.1.1 Features of Gas Exchange Surfaces Questions question 1

[Maximum number: 3]

Fig. 6.1 shows part of the human gas exchange system.

Fig. 6.1

Fig. 6.1

Describe and explain how the alveoli are adapted for gas exchange.

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