BRAINCAKEStructure of the Gills
Fish have a waterproof covering. They are relatively large and so have a small surface area to volume ratio.
In order to supply and remove respiratory gases they have evolved a specialised internal gas exchange surface called the gills.
Gills are located in the body behind the head.
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Key terms in this lesson
- surface area to volume ratio
- The ratio of an organism's or structure's external surface area to its total volume, which decreases as size increases.
More in Exchange of Gases
- Mass Transport
- Increasing the Rate of Diffusion
- Limitations of the Tracheal System
- Gas Exchange in Fish
- Counter Current Exchange
- Gas Exchange in Leaves
- Stomata
- Limiting Water Loss in Insects
All 28 lessons in Exchange of Gases · All AQA AS-level Biology topics