- 2/3 of all named species are anthropods.
- Though arthropods are very diverse, they all have an exoskeleton.
- The word Arthropod means "jointed foot".
- All exoskeletons are made of chitin.
- Arthropods live in almost every enviornment, which is one reason why they are so numerous.
- Myriapods can have over 1000 legs and include millipedes and centipedes.
