| A | B |
|---|
| Exoskeleton | A body covering, typically made out of chitin, that provides support and protection |
| Molt | To shed an old outer cover so that it can be replaced with a new one |
| Thorax | The body region between the head and the abdomen |
| Abdomen | The body region posterior to the thorax |
| Cephalothorax | A body region composed of the head and thorax fused together |
| Compound eye | An eye made of many lenses, each with a very limited scope |
| Simple eye | An eye with only one lens |
| Open circulatory system | A circulatory system that allows the blood to flow out of the blood vessels and into various body cavities so that the cells are in direct contact with the blood |
| Statocyst | The organ of balance in a crustacean |
| Gonad | A general term for the organ that produces gametes |
| Five characteristics of organisms in class Arachnida | Four pairs of walking legs, a cephalothorax instead of seperate head and thorax, usually have four pairs of simple eyes, no antennae, respiration done through organs known as "book lungs" |
| Complete metamorphosis | Insect development consisting of four stages: egg, larva, pupa, and adult |
| Incomplete metamorphosis | Insect development consisting of three stages: egg, nymph, and adult |
| Order Lepidoptera | Butterflies and moths; scaled wings |
| Order Hymenoptera | Ants, bees, and wasps; membranous wings, and usually stingers |
| Order Coleoptera | Beetles; horny wings |
| Order Diptera | Flies, gnats, and mosquitoes; membranous wings |
| Order Orthoptera | Grasshoppers and crickets; one pair of leather-like wings that protect their membranous wings. |
| List all the characteristics of members of Class Insecta | Three pairs of walking (or jumping) legs; usually have wings at some stage of their life; one pair of antennae; and three segments: head, thorax, and abdomen |
| List the basic types of wings in class Insecta | Membranous wings, scaled wings, leather-like wings, and horny wings |
| Five characteristics of Arthropods | An exoskeleton, body segmentation, jointed appendages, a ventral nervous systemn, and an open circulatory system |
| Class Chilopoda | Centipedes |
| Class Diploda | Millipedes |
| Basic types of spider webs | sheet web, orb web, and tangle web |
