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Phylum Chordata Definition, Characteristics, Classes

Phylum Chordata Definition, Characteristics, Classes

A phylum within the animal kingdom, which includes all animals that have at least one time in their lives, a noochord (a hollow nerve) and pharyngeal slits along with a tail of muscle that extends beyond the anus. It includes three subphylas: Cephalochordata, Urochordata, and Vertebrata (vertebrates). 

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