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‘A’ is a cylindrical structure that begins from the lower end of the medulla and extends downwards. It is enclosed in bony cage 4B’ and covered by membranes ‘C’. As many as ‘D’ pairs of nerves arise from the structure ‘A’. (i) What is A?(ii) Name (a) bony cage ‘B’ and (b) membranes ‘C’ (iii) How much is D? |
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Answer» (i) Spinal cord (ii) (a) Cranium (b) Duramater, Arachnoid membrane, Piamater (iii) 31 pairs of Spinal nerves |
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