Question

‘A’ is a cylindrical structure that begins from the lower end of medulla and extend 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

Answer:

The structure P is the spinal cord. It is a cylindrical structure that begins in continuation with the medulla and extends downwards. (i) The bony cage Q is the vertebral column.

Answer 2

Answer:

A.Spinal cord

C.Meninges