Explain nervous system of cockroach.

$\Rightarrow$ The nervous system of cockroach is spread throughout the body. The head holds a bit of nervous system of cockroach while the rest is situated along the ventral part of the body so if head of a cockroach is cutoff it will still live for as long as one week.

$\Rightarrow$ In the head region, the brain is represented by supra-oesophageal antennae which supplies nerves to antennae and compound eves.