What kind does the nervous system of an earthworm have?

First, let’s remember that the body of the earthworm is divided into many peculiar sections – segments. They can shrink. This is how the worm moves. A ring of the circulatory system is located inside each such segment. The nervous system runs through his entire body. It is quite simple for him. Most of the nerve cells are located in the front of the worm. This cluster is called the periopharyngeal ring. The neural chain runs in the abdominal cavity of the worm. There is a nerve knot in each segment. This is how the life processes of the worm are regulated.