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Question

Oxygen is absorbed through the alveoli in the lungs. How are the alveoli adapted for this function? [3 MARKS]


Solution

Each point: 1 Mark

Some features of the alveoli that allow this are as follows:

  • they increase the surface area in lungs for absorption 

  • they have thin walls (just one cell thick)

  • they have a lot of tiny blood vessels called capillaries.


 

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