A hollow cord dorsal to the notochord; later modified into the brain and spinal cord; embryonic features unique to chordates.
Filter-feeding organs; at some stage of life, found in all chordates.
A tail that is opposite the head and extends past the anus.
Consists of all animals with a notochord, dorsal hollow nerve cord, post-anal tail, and pharyngeal slits during at least some stage of their life; includes fish, amphibians, reptiles, birds, and mammals.
Animal with a vertebral column, or backbone.
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Overview of the characteristics and classification of chordates.