| A | B |
|---|
| exoskeleton | rigid outer covering |
| molting | shedding of exoskeleton |
| open circulatory system | type of circulatory system in arthropods |
| Sexually | how do arthropods reproduce |
| Crustacean | arthropods with 5 pairs of legs |
| Arachnids | arthropods with 4 pairs of legs |
| Insects | arthropods with 3 pairs of legs |
| regeneration | regrow lost body parts |
| centipedes | have 1 pair of legs per segment |
| millipedes | have 2 pairs of legs per segment |
| 3 insect body parts | head chest abdomen |
| insect eyes good for detecting movement | compound |
| insect eyes that detect dark and light | simple |
| metamorphosis | a dramatic change |
| an incomplete change | incomplete metamorphsis |
| pheromones | powerful chemicals that attract a mate |
| echinoderms | animals with a spiny skin |
