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Chordata: A major phylum in the Kingdom Animalia. A chordate is characterized by the presence of a dorsal notochord at some stage of development and a dorsal hollow nerve chord.
in the interior of the gastrula to form the mesoderm (schizocoelous development), but in deuterostomes it forms through evagination of the endoderm, called enterocoelic pouching. Deuterostomes also have a dorsal, rather than a ventral, nerve chord ...
interior of the gastrula to form the mesoderm, called schizocoelous development, but in deuterostomes it forms through invagination of the endoderm, called enterocoelic pouching. Deuterostomes also have a dorsal, rather than a ventral, nerve chord ...
 See also: Coelom, Life, Endoderm, Mesoderm, Organ
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