Ventilation in insects mindmap

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  • Created by: efg150
  • Created on: 26-03-21 15:48
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  • Ventilation in Insects
    • Tracheae
      • Microscopic air-filled pipes
      • Spiracles
        • Air moves into the tracheae through pores on the insect's surface called spiracles
        • Oxygen travels down the conc. gradient towards the cells.
          • Carbon dioxide from the cells moves down its own conc. gradient towards the spiracles to be released into the atmosphere.
      • Tracheoles
        • The tracheae branch off into smaller tracheoles.
        • Thin, permeable walls and go to individual cells.
        • Contain fluid, which oxygen dissolves in.
          • The oxygen then diffuses from this fluid into body cells.
            • Carbon dioxide diffuses in the opposite direction.
    • Rhythmic abdominal movements
      • Insects use this to change the volume of their bodies and move air in and out of the spiracles.
      • When larger insects are flying, they use their wing movement to pump their thoraxes too.

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