Invertebrates are those animals without a backbone (spinal column). Invertebrates include animals such as insects, worms, jellyfish, spiders - these are only a few of the many types of spineless creatures. Invertebrates have played an important role in discoveries about how the nervous system works. read more
The earthworm has a simple yet sensitive nervous system. Its cerebral ganglion, or brain, is connected to the ventral nerve cord, which runs the length of its body. At each segment, segmental ganglion branch off from the ventral nerve cord, thus connecting every segment to the earthworm's brain. read more
Nervous System of Earthworm Ganglion of ganglia. It is the fused form of nerves. It is found in all segment. The nervous system of earthworm is well developed. It consists of 3 parts: Central nervous System; Peripheral nervous system; Sympathetic nervous system; Central nervous system; This part of nervous system lies along the mid-line of the body. read more