If the head of cockroach is removed, it may live for few days because (1) the cockroach does not have nervous system. (2) the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body. (3) the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body. (4) the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.

Vinay

3 years ago

Correct option:(2)the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.

Solution:

Nervous system of cockroach is distributed very little in head and most of the nervous system along the ventral part of the body of cockroach.
It may the reason cockroach may live for few days even after removal of the head from the body.