Respiratory System


  • 1) Gas exchange takes place at the alveoli. Describe one feature of the alveoli which makes it ideal for gas exchange. 1 Marks


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  • 2) The air that we inhale contains 21% oxygen. The air that we exhale contains 16% oxygen. Explain why there is a difference between these numbers. 2 Marks



    Video Mark Scheme


  • 3) Define tidal volume and explain what will happen to tidal volume during exercise. 2 Marks


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  • 4) Diffusion takes place at the site of the lungs. Explain the process of diffusion at the site of the lungs. 4 Marks


    Video Mark Scheme



Revision Resources 2023-24

The PE Classroom Revision Resources are now available to pre-order at a discounted rate! 

All courses are currently available for pre-order at a price of £99 (this will increase in January). All teachers who already have a Resource Package membership of the PE Classroom will be able to get access to the Revision Package for a for £49.

Follow this link to find trial topics for each course and a make a pre-order: