Visceral / sympathetic nervous system

It is divided in to three systems:

(i) Oesophageal sympathetic / stomatogastric nervous system: – It is directly connected with the brain which supplies nerves for the anterior part of the alimentary canal (foregut and midgut), heart and certain other parts. It is dorsal in position.

(ii) Ventral sympathetic nervous system: – Consist of a pair of transverse nerves that are connected with each ganglia of VNC. The transverse nerves pass to the spiracles of that particular segment.

(iii) Caudal sympathetic nervous system: Some additional nerves arises from posterior compound ganglion of VNC which supply nerves for the posterior part of the gut and the reproductive system.

Peripheral NS:

• It includes all the nerves coming from the ganglia of CNS and that of the visceral nervous system.