This title explains how humans and animals have a skeleton to support the inner workings of their bodies and how the muscles attached to our skeletons help us move. Also explains how exoskeletons are skeletons on the outside of bodies, giving examples of insects with exoskeletons, such as ants. Examples of endoskeletons are also provided. Gives detailed information on each, along with their habitats, eating habits, and ways they adapt to survive. A special section called "Explore Your World" outlines an experiment that allows students to identify and examine this intriguing topic first-hand.