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B1-Transport in cells - Coggle Diagram

- - - - explain the need for exchange surfaces and a transport system in multicellular organisms in terms of SA:vol
    - - small intestine
      - lungs
      - gills
      - roots
      - leaves
    - - 1.
      - 2.
      - 3.
      - 4.
- - - - How do you use the graph to estimate the concentration of sugars in the cytoplasm of the cells?