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InterviewSolution
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Explain in brief die central nervous system in cockroach. |
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Answer» It includes nerve ring and the nerve cord. Nerve ring : It is situated in the head around the oesophagus and consists of a pair of supra-oesophageal ganglia, a pair of circum-oesophageal connectives & a pair of sub- oesophageal ganglia. The supra-oesophageal ganglia are also called as brain and is formed by the fusion of three pairs of ganglia. The brain is a bilobed structure which has three parts-
The sub-oesophageal ganglia are also formed by the fusion of three pairs of ganglia. They remain situated below the oesophagus. |
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