Everything about The Ventral Nerve Cord totally explained
The
ventral nerve cords make 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. This characteristic is important in qualifying the difference compared to the
chordates which have a
dorsal nerve cord.
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
(External Link
). 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. This characteristic is found mostly in the
insects.
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