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12.1: Chordates

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

dorsal hollow nerve cord

A hollow cord dorsal to the notochord; later modified into the brain and spinal cord; embryonic features unique to chordates.

pharyngeal slits

Filter-feeding organs; at some stage of life, found in all chordates.

post-anal tail

A tail that is opposite the head and extends past the anus.

chordate

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.

vertebrate

Animal with a vertebral column, or backbone.

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Difficulty Level:
At Grade

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Date Created:
Feb 24, 2012
Last Modified:
Sep 04, 2016
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SCI.BIO.828.L.1