Phylum: Arthropoda ( Insects, Crustaceans, Spiders, Scorpions, Millipedes)

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  • 3 layer body plant with bilateral symmetry.

  • Hard exoskeleton composed of chitin.

  • Jointed body segments.

  • Jointed appendages.

  • Some flying organisms in the class Insecta. ( 106+ species)

  • Separate mouth and anus.