An exoskeleton is a type of skeleton that's an external anatomical feature that supports and protects an animal's body, in contrast to the internal endoskeleton of, for example, a human. Whilst many, many other invertebrate animals (such as shelled mollusks) have exoskeletons in the sense of external hard parts, the characteristic is most associated with the arthropods (for example insects, spiders, myriapods and crustaceans). Exoskeletons contain rigid and resistant components that fulfil a set… (More on Exoskeleton)