By: Tiffany

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• By Tiffany

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Characteristics

• Cant have a backbone
• Got to be able to move
• Be able to digest

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Invertebrate Phyla

• Porifera
• Cnidaria
• Nematoda
• Platyhelminthes

• Mollusca
• Arthropoda
• Annelida
• Echinodermata

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Phylum Cnidaria

• Has to have a medusa
• Also ha to have polyp
• Has to have a complex tissue, a gut for digesting
  food, and a nervous system.

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Phylum Porifera

• Got to have pores
• Has to have collar cells
• Has to have osculum
• For example a sea sponge

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Phylum Nematoda

• Round, long, and slender
• Have to have a simple nervous system
• Has a fluid-filled body cavity
• Have bilateral symmetry
• Example
  
  
• Round worms

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Phylum Platyhelminthes

• All phylum platyhelminthes is, is a fancy word
  for flat worm
• Have bilateral symmetry
• They have 2 large eye spots
• Has 2 bumps on each side of their heads

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Phylum Annelida

• Has to have a coelom
• Also has to have a closed circulatory system
• Has ganglia in each segment of its body

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Phylum Mollusca

• Mollusca is the second large phylum of the
  animals
• Has a gastropods, bivalves, cephalopods as 3
  classes
• Lives in water
• Some live on land
• example
  
• snails, slugs, clams, oysters, squids, and
  octopuses

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Phylum Arthropoda

• Have jointed limbs
• Has to have a segmented body
• Also has a exoskeleton
• Got to have a well-developed nervous system

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Phylum Echinodermata

• They are marine animals
• They live in the sea floor
• Some are scavengers
• Example
• starfish, sea urchins, sea lilies, sea
  cucumbers, brittle star, and sand dollar