KNOWYOUR BODY-SPINE

The  Spine  or vertebral,column has  two  main  functions;it serve  as a  protective  surrounding  for  the delicate  spinal  cord. and form the  supporting   back  bone of the Skeleton .The spine consist  of 24   separate   differently  shaped  bones vertebrae  with  a curved  ,triangular  bone the sacrum at the  bottom.The  sacrum  is made up  of  fused  vertebrae  ; at  the  lower  end   is  a  small  tail  like  structure  made up  of tiny  bones ,collectively  called  the coccyx.Between  each pair  of vertebrae  is a disk  of cartilage  that cushions  the  bones during the movement.The  top  two  vertebrae differ  in  appearance  from  the others  and works  as a pair ;the  first  called  the atlas ,rotates   around  a stout vertical  peg  on  the second,the axis.This arrangement  allows  the skull  to  move freely up  and down, and from side to side.