Insects are very adaptable, living almost everywhere in the world. Insects have an exoskeleton that covers their entire body. An insect's body consists of the head, thorax and abdomen. The insect's head has a pair of antennae, and a pair of compound eyes. Compound eyes are different from human eyes which have a single lens for each eye.
Compound eyes have many lenses for each eye.
For example, the fly has about 4,000 lenses in a single eye. This provides them with very good eyesight. The thorax contains the legs for walking, swimming, jumping or digging. The thorax may also have wings for flying. The abdomen contains many body organs, such as the heart, respiratory system, digestive system and reproductive system.