INVERTEBRATES

INVERTEBRATES

1. WE CAN CLASSIFY INTO SIX GROUP

   • ARTHROPODS
     • ALL ARTHROPODS HAVE AN EXTERNAL SKELTON CALLED AN EXOSKELETON
       • CRUSTACEANS
         • HAVE TWO BODY PARTS
           • CEPHALOTHORAX
           • ABDOMEN
           • FIVE PÀIRS OF LEGS
       • MYRIAPODS
         • HAVE LONG,THIN,SEGMENTED BODIES.
           • THEY HAVE MANI PAIRT OF LEG AND TWO ANTENNAE
             • LIVE IN DARK,DAMP PLACES.
       • ARACHNIDS
         • TWO BODY PARTS
           • CEPHALOTHORAX
           • ABDOMEN
         • FOUR PAIRS OF LEGS
         • EIGHT EYES
       • INSECTS
         • THREE BODY PARTS
           • ABDOMEN
           • THORAX
           • HEAD
         • ANTENNAE,THREEPAIRS OF LEGS, ONE ORE TWO PAIRS OF WINGS
   • MOLLUSCS
     • THERE ARE THREE SUB GROUP
       • GASTROPODS
       • BIVALVES
       • CEPHALOPODS
   • ECHINODERMS
     • THEY ARE COVERED BY AHARD ,SPINY ,SKIN.STARFISH
   • CNIDARIANS
     • LIVE IN THE SEA
       • THEY HAVE A SOFT,JELLY-LIKE BODY WITH ONE OPENING
         • HAVE VENOMOUS TENTACLES.
   • ANNELIDS
     • HAVE A LONG,SOFT BODY WITH MOIST SKIN.
   • SPONGES
     • THEY ARE THE SIMPLEST INVERTEBRATES
     • LIVE IN WATER

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