Zoology - Structural Organisation in Animals Question with Solution | TestHub

The head of the cockroach has a nerve ring made up of supra-oesophageal ganglion, sub-oesophageal ganglion, and circum-oesophageal connectives. Out of this, the supra oesophageal ganglion is the largest and it is also called cerebral ganglia or brain of the cockroach.