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A-level Biology · AQA 7402

3.3 Exchange with the environment: AQA A-level Biology video lessons

Surface area to volume ratio, gas exchange, digestion and absorption, and mass transport in animals and plants.

3.3.1 Surface area to volume ratio

  1. Surface Area to Volume Ratio Explained

    AQA 7402 · 3.3.14:18Maths skill4 marks

  2. SA:V Ratio, Body Size and Metabolic Rate

    AQA 7402 · 3.3.13:424 marks

3.3.2 Gas exchange

  1. Gas Exchange: Single Cells and Insects

    AQA 7402 · 3.3.24:064 marks

  2. Fish Gills and the Counter-current Principle

    AQA 7402 · 3.3.24:035 marks

  3. Gas Exchange in Leaves: Mesophyll and Stomata

    AQA 7402 · 3.3.23:474 marks

  4. Gas Exchange vs Water Loss: Xerophytes

    AQA 7402 · 3.3.24:184 marks

  5. Human Gas Exchange System and Alveoli

    AQA 7402 · 3.3.23:554 marks

  6. Ventilation: How Breathing Works

    AQA 7402 · 3.3.24:395 marks

  7. Lung Disease and Gas Exchange

    AQA 7402 · 3.3.24:134 marks

  8. Smoking, Pollution and Lung Disease Data

    AQA 7402 · 3.3.24:404 marks