Hexapoda - The Insects
Insects don't have spines; they are invertebrates. Insects have segmented bodies. Their bodies are divided three sections - the head, the thorax, and the abdomen. The head has antennae and a pair of compound eyes. Insects have six legs, one pair on each of its three segments. Some insects also have wings. Insects also have an exoskeleton. The exoskeleton is an outside covering that protects the insect's internal organs. There are over 800,000 species of insects - more than all the other animal groups combined! Insects can be found in a wide-variety of environments all over the world!