The spinal cord begins at the occipital bone and extends down to the space between the first and second lumbar vertebrae; it does not extend the entire length of the vertebral column.
Earthworms are invertebrates, lacking a skeleton. To support and shape the body, they are filled with coelomic fluid. Earthworms sometimes appear to have a belt or saddle around their bodies; this is a clitelum, a structure containing maturing eggs.
Rating Newest Oldest. Best Answer: The earthworm has a cerebral ganglion, which serves as its brain. It is connected to the rest of the body by means of a ventral nerve cord. There is a swelling, called a ganglion, in each segment.. These two cerebral ganglia are connected to the rest of the body as follows: Sensory nerves leave the brain and run forward into the prostomium (extreme anterior end) and first segment. From there, a ventral nerve cord connects all the segments of the worm. 3.