Life+Science

=__**Life Science:**__= __**Invertebrates**__: == = = ==

Invertebrates: Of the million or more animal species in the world, more than 98% are invertebrates. Invertebrates do not have a backbone. The invertebrates range from microscopic in size to large coral reefs.

The major groups are:

1. Porifera- sponges 2. Cnidaria- Jellyfish, sea anemone, and hydra 3. Platyhelminthes- flatworms 4. Nematoda- roundworms 5. Annilida- segmented worms 6. Mollusca- Gastropods, bivalves, and cephalopods 7. Arthropoda- centipedes, millipedes, insects, crustaceans, and arachnids 8. Echinoderms- sea urchins, sea stars, and sea cucumbers

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Check out this power point on invertebrate vocabulary. []