Cockroach is a black or brown straight-winged insect that is sometimes found in people's homes.
A cockroach can live for weeks without its head. They are not dependent on the mouth or head to breathe, due to their open circulatory system, and the fact that they breathe through little holes in each of their body segments.
Cockroach only dies out of starvation, because without a mouth, it can't drink water or eat anything.
Generally insects coordinating system is not centralised as that of humans. In humans, the brain coordinates every activity. In insects the CNS has different function, the peripheral nervous system has a different function and then they have a 3rd one called Visceral nervous system. The visceral nervous system performs this function of the cockroach not dying even when the head's chopped off.
How to get rid of cockroach;
* Get 1 onion and slice it
* Get 1 teaspoon of baking soda
Then mix both together and place in the corners of your house, kitchen and bathroom.
Soon you will start noticing the dead cockroaches around your house.
Repeat it till you are satisfied of getting rid of the insects.
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