The segmental ganglia (singular: s. ganglion) are ganglia of the annelid and

arthropod central nervous system The central nervous system (CNS) is the part of the nervous system consisting primarily of the brain and spinal cord. The CNS is so named because the brain integrates the received information and coordinates and influences the activity of all par ...

that lie in the segmented

ventral nerve cord The ventral nerve cord is a major structure of the invertebrate central nervous system. It is the functional equivalent of the vertebrate spinal cord. The ventral nerve cord coordinates neural signaling from the brain to the body and vice versa, i ...

. The ventral nerve cord itself is a chain of ( metamerism ganglia, some compressed.

References

Animal nervous system Arthropod anatomy Annelid anatomy {{Arthropod-anatomy-stub