How can a Cockroach survive without its head?

How can a Cockroach survive without its head?

Cockroaches breathe through spiracles which are small openings on the skin. It is the spiracles and not the blood that carries oxygen to each cell of the body through a set of tubes called trachea. The brain does not c

ontrol the breathing through spiracles. Also, the cockroach does not have blood pressure and so cutting off the head does no lead to uncontrolled bleeding. So a cool temperature could allow a cockroach to last about a month without need for its head, as long as they are not infected by mould, bacteria or virus, which could kill them.