| A | B |
| Moulting or ecdysis | Removing the exoskeleton |
| Arthropod means this | Jointed legs |
| Myriapod means this | Many legs |
| Cephalothorax | Combined head and thorax |
| Halteres | Used for balance in insects |
| Radula | Used by snails to feed |
| Shell | Main characteristic of molluscs |
| Octopus | Mollusc with no shell |
| Echinoderm means this | Spiny Skinned |
| Tubular feet | Echinoderms use these to move |
| Radial | Type of symmetry in echinoderms |
| Radula and a beak | Two things which squid and cuttlefish use to feed with |
| Herbivorous | Type of feeding in millipedes |
| Carnivorous | Type of feeding in centipedes |
| Stepwise | Shape of growth curve in arthropods |
| Exoskeleton | Protection for arthropods |