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Invertebrate animals (Echinoderms (Classification (Sea urchins, Brittle…

- - - - Muscular foot
      - Visceral mass
      - Head
    - - Interaction
      - Reproduction
      - Nutrition
    - - Cephalopods
        
        Internal shell
        
        Tentacles
        
        They has a chewing mouth called beak
      - Gastropodes
        
        Muscular foot
        
        Four tentacles
        
        Single-spiral shaped shell
      - Bivalves
        
        shell with two valves
        
        single axe-shaped foot
- - - - Parts
        
        Wings
        
        Abdomen
        
        Head
      - Some are herbivorous, others are scavengers,others parasites and others are predators
      - They do metamorfosis that is the radical change between the joung insects and the adults insects
    - - They are strong because their exoskeleton is made up of calcium carbonate
      - Parts
        
        Abdomen
        
        Cephalothorax
    - - Parts
        
        Cefalotorax
        
        Pedipals
        
        Chelicerae
        
        Legs
      - They are terrestrial, carnivorous and they trap their prey and they after inject poison
    - - Parts
        
        Head
        
        Anntenae
        
        Rings
        
        Poison claws
      - They are terrestrial and some of them are predators
- - - - tiny pores