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3 BIOL - Coggle Diagram

- - - - b Thermoreceptors
        
        heat or cold
      - c Nociceptors
        
        pain
      - a Mechanoreceptors
        
        pressure, position, acceleration
      - d Chemoreceptors
        
        chemicals
      - e Osmoreceptors
        
        changes in water volume
      - f Photoreceptors
        
        visible light