| A | B |
|---|
| Arthropods | invertebrates with jointed appendages |
| thorax | middle section that holds legs and wings |
| head | part that holds sensory organs and mouth area |
| abdomen | part that holds the organs |
| exoskeleton | protective covering on the outside |
| endoskeleton | support structure on the inside |
| molting | the shedding of an exoskeleton |
| eyes with many lenses | compound eyes |
| the exoskeleton is like | a suit of armor |
| arachnids | have 8 legs and two body parts |
| cephalothorax | head and thorax together |
| chelicerae | fangs on spiders with poison glands |
| all spiders produce | silk for webs |
| crustaceans | have mandables, claws, 2 pairs of antennas |
| crayfish, lobsters and shrimp are | crustaceans |
| centipedes | are carnivores, move quickly and have 2 legs per segment |
| millipedes | are herbivores, slow movers, have 4 legs per segment |
| spiders kill more | insects than birds |
| mandables | jaw-like appendages |
| antennas | organs used for balance and sensing |
