While there are a million different types of insects, all have a hard exoskeleton which is segmented into three parts. In fact the word "insect" is derived from the Latin meaning segmented.
How Fleas Work
Fleas have three real talents â€“ eating, breeding and waiting. If you leave your home and take your pets with you, any fleas inside will just wait for you to return so they can get back to eating blood and making babies.