important characteristics of chordates
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Animals in the phylum Chordata share four key features: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
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▶The dorsal hollow nerve cord is part of the chordate central nervous system.
▶In vertebrate fishes, the pharyngeal slits become the gills.
▶Humans are not chordates because humans do not have a tail.
▶Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.
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