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Surface Area Exchange Sa:V Body Explain Volume Ratio

Front Explain how surface area to volume ratio affects the need for a specialised exchange system.
Back SA:V & exchange systems:
  • As organisms get larger, SA:V gets smaller and distances substances need to travel from outside to reach cells in center of body get longer
  • This makes it harder and ultimately impossible to absorb enough oxygen through the available surface area to meet the demands of the body


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