if the head of cockroach is cut off then it will be living for atleast weeks. How?
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In cockroaches, a small part of the nervous system is present in the head region. The rest of the nervous system is situated on the ventral side of the body. Hence, if the head of a cockroach is cut off, it remains alive for one week.
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cockroach can live for a week without its head. Due to their open circulatory system, and the fact that they breathe through little holes in each of their body segments, they are not dependent on the mouth or head to breathe. The roach only dies because without a mouth, it can't drink water and dies of thirst
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