| A | B |
|---|
| arthropod | an invertebrate with symmetry, a coelom, an exoskeleton, and jointed appendages |
| appendage | any structure that goes out of the body of an animal |
| molting | shedding of the old exoskeleton |
| cephalothoras | the fused head or thorax of an arthropod |
| tracheal tubes | branching networks of hollow air passages |
| book lungs | air-filled chambers that contain leaflike plates |
| pheromes | chemical odor signals |
| simple eye | has only one lens |
| compound eye | has many lenses |
| mandible | the mouth, for example |
| centipede | has 15 to 181 body segments |
| millipede | has more than 100 segments, 2 spiracles, and 2 pairs of legs |
| butterflies | there are more than 100,000 species of these |
| bees | live in large colonies, known as hives |
| grasshoppers | have 2 compound and 3 simple eyes |
| honey bees | are able to make honey in their combs |
| nymph | a baby insect that lives in the water |
| metamorphosis | a series of changes that an animal may undergo |
