An exoskeleton, in contrast to an endoskeleton, is an external anatomical feature that supports and protects an animal's body.
All arthropods (such as insects, spiders and crustaceans) and many other invertebrate animals (such as shelled mollusks) have exoskeletons.
Lobsters, for example, have tough outer shell systems which provide rigidity and shape to their bodies.
For more information about the topic Exoskeleton, read the full article at Wikipedia.org, or see the following related articles:
Recommend this page on Facebook, Twitter,
and Google +1:
Other bookmarking and sharing tools: