Monday, February 14, 2011


Invertebrates do not have a backbone. They do not have bones.
Some invertebrates have soft bodies, some have a shell and other have a hard outer covering to their bodies.
They can live in the water, undrground, in a tree trunk or in the body of another animal.

The most important groups of invertebrates are:
  • Annelids have a long softy body, divided into segments. They have no protective covering. Earth worms are annelids.
  • Molluscs have a soft body, covered with a shell. Snails are molluscs.
  • Arthropods have a hard outer covering, or exoskeleton.

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