| A | B |
|---|
| Trilobitomopha | subphylum consisting of extinct marine animals |
| Chelicerata | subphylum that includes animals with pincerlike appendages used for feeding such as scorpion |
| Crustacea | subphylum of aquatic animals including shrimp, crawfish, and lobsters |
| Hexapoda | subphylum that includes insects and their relatives |
| Myriapoda | subphylum of animals with body divided into head and trunk, including millipedes and centipedes |
| arachnids | group of arthropods that include spiders and ticks |
| thorax | the middle segment of the arthropida body |
| carapace | covering of the grasshopper near the wings |
| cephalothorax | joined head and thorax (arachnids) |
| mandible | insect mouthpart used for biting and cutting food |
| claw | used by some crustaceans for caturing prey |
| swimmerets | little legs attached to crustacean abdomens used fro swimming |
| centipede | colorful carnivorous myriapoda (many legs) |
| Arthropoda | Phylum of animals that have a hard exoskeleton, body segments and jointed appendages |
| abdomen | lower segment of the arthropida body |
| metamorphosis | mechanism whereby an embryonic stage of an animal changes into a different adult body form |
| molting | the process of shedding the exoskileton to grow a new bigger one |
| appendages | feelers, mouth parts, legs or wings |
| arthro | jointed |
| ascaris | type of parasitic roundworm |
| cuticle | protective covering on worms |
| exoskeleton | hard outer skeleton |
| poda | foot |
| pseudocoelom | false or partial body cavity (tube within a tube) |
| tagmation | body segments are fused together |
