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Supply Organisms Increase Cells Large Diffusion Explain Meeting

Front Explain why supply meeting demand requires adaptations as organisms incerase in size.
Back As organisms increase in size:
  • They are made up of more cells that all require constant and large supply of O and removal of a lot of CO2
  • Their metabolic rate is usually higher meaning more respiration needs to occur 
  • Diffusion distances will increase - not possible to supply cells deeper inside the organism through just the surface
  • Smaller SA:V ratio - slow diffusion and gases cant be exchanged fast enough or in large amounts

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