Preferred Label : ventral nerve cord;
Uberon definition : The pair of closely united ventral longitudinal nerves with their segmental ganglia
that is characteristic of many elongate invertebrates (as earthworms)[BTO]. A large
process bundle that runs along the vental mid-line extending from the ventral region
of the nerve ring[WB]. The ventral cord is one of the distinguishing traits of the
central nervous system of all arthropods (such as insects, crustaceans and arachnids)
as well as many other invertebrates, such as the annelid worms[GO].;
Uberon synonym : ventral cord;
Uberon Taxon note : 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 ('belly',
as opposed to back) 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. 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.;
Origin ID : 0000934;
intersects midsagittal plane of
- part of
The pair of closely united ventral longitudinal nerves with their segmental ganglia
that is characteristic of many elongate invertebrates (as earthworms)[BTO]. A large
process bundle that runs along the vental mid-line extending from the ventral region
of the nerve ring[WB]. The ventral cord is one of the distinguishing traits of the
central nervous system of all arthropods (such as insects, crustaceans and arachnids)
as well as many other invertebrates, such as the annelid worms[GO].
