UNIT 2  INVERTEBRATE GROUPS

The classification of the invertebrate groups is based in a simple question:

Do they have any body protection? 

 

If they haven´t body protection, you can find these groups:

• SPONGES
• CNIDARIANS
• WORMS

If they have body protection, you can find these groups:

• ECHINODERMS
• ARTHROPODS
• MOLLUSCS
  

SPONGES

CNIDARIANS

WORMS

 

 

 

ECHINODERMS



 

 

 

MOLLUSCS

 

 

 

 

 

 

ARTHROPODS