Nerve cord
Encyclopedia
Nerve cord may refer to the following structures:
  • in invertebrate
    Invertebrate
    An invertebrate is an animal without a backbone. The group includes 97% of all animal species – all animals except those in the chordate subphylum Vertebrata .Invertebrates form a paraphyletic group...

    s, it refers to the ventral nerve cord
    Ventral nerve cord
    The ventral nerve cord makes up the nervous system of some phyla of the invertebrates, particularly within the nematodes, annelids and the arthropods. It usually consists of cerebral ganglia anteriorly with the nerve cords running down the ventral plane of the organism...

    , whereas
  • in chordates, it stands for the dorsal nerve cord
    Dorsal nerve cord
    The dorsal nerve cord is one of the embryonic features unique to chordates, along with a notochord, a post-anal tail and pharyngeal slits. The dorsal nerve cord is a hollow cord dorsal to the notochord.It is formed from a part of the ectoderm that rolls, forming the hollow tube, compared to other...

    .
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