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The complex of nerve tissues including the brain and spinal cord, but excluding the peripheral nervous system.

8 votes

Are there organisms with fewer than 1000 neurons?

Re: insect brain size Following article has a good summary — in short insects' nervous systems range from 7400 to 850000 neurons: http://blogs.discovermagazine.com/notrocketscience/2011/11/30/how-fa …
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