Specialised exchange surfaces

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  • Created by: elle1999
  • Created on: 22-01-16 15:22
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  • Specialised exchange surfaces
    • Increased surface area
      • Provides area needed for exchange
      • Overcomes limitations of SA:V ratio.
      • Root hair cells
    • Thin layers
      • Distance the substance diffuses is short- process fast and efficient.
      • Alveoli
    • Good blood supply
      • Steeper the concentrationgradient, the faster the diffusion takes place
      • Substances constantly delivered to and from surface
      • Gills
    • Ventilation to maintain diffusion gradient
      • Maintains gradient
      • Process more efficiently
      • Gills- flow of water carrying dissolved gases.


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