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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 ("belly", as opposed to back) plane of the organism.

Ventral nerve cords from anterior to posterior (the thoracic and abdominal tagma in the arthropods) are made up of segmented ganglia that are connected by a tract of nerve fibers passing from one side to the other of the nerve cord called commissures [1]. The complete system bears some likeness to a rope ladder. In some animals the bilateral ganglia are fused into a single large ganglion per segment. .

See also

References

  • Hickman, Cleveland; Roberts L. Keen S. Larson A. Eisenhour D. Animal Diversity (4th ed.). New York: McGraw Hill. ISBN 978-0-07-252844-2. 

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