Animals are classified from largest to smallest in the order: kingdom, phylum, class, order, family, genus, and species. The animal kingdom contains all animals, and the phylum is further divided into phylums such as Chordata (vertebrates) and Arthropoda (insects, crabs). The class includes mammals, birds, etc., and the order is Primates and Carnivora. The family is further subdivided, such as Felidae and Canidae, and the genus and species are more specific, ultimately determining a specific ani