INVERTEBRATES

INVERTEBRATES

1. ARTHROPODS

   • Is the largest invertebrate group.
     • Myriapods: Long,thin and segmented bodies,have many pairs of legs andn two antennae,live in dark,damp places.
     • Insects: Three body parts:a thorax,a head and an abdomen,two antennae and three pairs of legs,most have two pairs of wings.
     • Arachnids: Have two body parts:a caphalothorax and a abdomen,The cephalothorax is made up of the head and the thorax.They have four pairs of legs and up to eight eyes.
     • Crustaceasns: Have two body parts:a cephalothorax and a abdomen.Their skeleton is very hard,like a shell.They have five pairs of legs,they also havefour antennae.

2. MOLLUSCS

   • Cephalopod
   • Bivalves
   • Gastropods

3. ECHINODERMS

   • Live at the botton of the sea,are, covered hard,spiny skin.Starfish are echinoderms.

4. SPONGES

   • Live in water,are the simplest invertebrates, dont have muscles nervous system or circulatory system

5. ANNELIDS

   • Have a long and soft body with moist skin. Live inside the bodies of other animals most live in water but they can also live in land

6. CNIDARIANS

   • Live in the sea,soft,jelly- like body.Jellyfish and sea anemones are cnidarians.

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