Insects are the most varied and engrossing class of animals in the animal kingdom.
The insects are animals from the arthropoda phylum , meaning that they have bilateral symmetry, a body made of jointed rings, exoskeletons, and a heart and nervous system. The arthropoda phylum is the biggest phylum in the animal kingdom. All insects have three pairs of legs and adult wings. Many people believe that spiders are insects, but, in fact, they are not. Spiders are arachnids, a group which includes all mites.