Ascarids
The nervous system of Ascarids consists of circumpharyngeal ring that carries a dorsal ganglion, a subdorsal ganglion, lateral ganglia and ventral ganglion. From the circumpharyngeal ring six small nerves supply the sense organs of the anterior side. Posteriorly six longitudinal nerves arise from the ring and reach the posterior end. They are mid dorsal nerve, mid ventral nerve, one pair of dorsolateral nerves and one pair of
ventrolateral nerves.
ventrolateral nerves.