Question

‘A’ is a cylindrical structure that begins from the lower end of the medulla and extends downwards. It is enclosed in bony cage ‘B’ 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?

Answer 1

1. A is the spinal cord.
2. (a) Bony cage is Vertebral column
   (c) is Meninges
3. D is 31 pairs of spinal nerves.