INVERTEBRATES

INVERTEBRATES

1. Arthropods

   • The largest invertebrate group.
   • Have an exoskeleton.
   • Myriapods
   • Crustaceans
   • Arachnids
   • Insects

2. Molluscs

   • There are three subgroups:
     • Gastropods
     • Bivalves
     • Cephalopods

3. Echinoderms

   • Live at the bottom of the sea.
   • Hard, spiny skin.
   • Starfish are echinoderms.

4. Sponges

   • Live in water.
   • The simplest invertebrates.
   • Have no muscles, circulatory system or nervous system.

5. Annelids

   • Long, soft body with moist skin.
   • Live inside the bodies of other animals. Most annelids live in water. Can also live on land.

6. Cnidarians

   • Soft, jelly-like body with one opening.
   • Live in the sea.

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