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INVERTEBRATES (molluscs (they can be (bivalves, cephalopods, gastropods),…

- - - - they have an open circulatory sistem
  - - - head
      - visceral mass
      - muscular foot
- - - - they have
        
        they have a cephalotorax
        
        cheliceare
        
        pedipalps
  - - - they have
        
        cephalotorax
- - - - They have tiny pores that are connected by canals
      - They are made up of a flexible material called spongin
      - They feed by filtration
    - - polyps
        
        They are like a sac
        
        At one end have the stucture that hols up
        
        on the other end they have a hole sourronfed of tentacles that act like a mouth and an anus
      - jellyfish
        
        they don´t move because the sea move its
        
        Like polyps they have a hole that act such us a mouth and an anus