Animals
Animals (Metazoa) are multicellular organisms that are capable of locomotion. Animals are heterotrophs, which means they rely on other organisms to obtain their nourishment. Most animals (with the exception of sponges) have bodies that are differentiated into tissues which are in turn organized into organ systems.
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Subcategories
Articles About Animals:
A Guide to Vertebrates and Invertebrates 
12 Jul 2006
Animal classification is a matter of sorting out similarities and differences, of placing animals in groups and then breaking those groups apart into subgroups. The whole endeavor creates a structure—a hierarchy in which the large high-level groups sort out...
by Rachel Carson
by Douglas Adams
by Edward O. Wilson
