| A | B |
|---|
| invertebrate (n) | an animal without a backbone |
| arthropods (n) | 1 of the invertebrate groups animals with tough exoskeletons and jointed legs; e.g. crustaceans, arachnids, insects |
| exoskeleton (n) | hard covering on the outside that protects the body (outer skeleton) |
| molt (v) | the process in which the exoskeleton is shed in order to grow a new one |
| insects (n) | 1 of the arthropod groups; have 3 pairs of jointed legs, 3 body segments and 2 pairs of wings |
| arachnids (n) | 1 of the arthropod groups; have 8 legs and 2 body segments |
| cnidarians* (n) | 1 of the invertebrate groups with round, soft bodies and tentacles |
| mollusks / molluscs* (n) | 1 of the invertebrate groups with soft bodies often covered in a shell; many have a 'foot' |
| echinoderms* (n) | 1 of the invertebrate groups with tube feet and 5 parts that symmetrically radiate from a central body |
| annelids* (n) | 1 of the invertebrate groups with long, soft segmented bodies |
| crustaceans* (n) | 1 of the arthropod groups; have at least 5 pairs of jointed legs, 2 pairs of antennae; breathe with gills, and usually have a claw |
| myriapods* (n) | 1 of the arthropod groups; have many legs and body segments |
| endoskeleton* (n) | a skeleton inside the organism’s body |
