ABSTRACT
The bony pelvis (the word ‘pelvis’ is from the Latin for ‘a basin’) has the form of a ring which, in the adult, is made up of three individual bones, the two hip bones and the sacrum. These, in turn, are formed by the fusion (joining) of eleven bones. The posterior wall of the pelvis is formed by the triangular sacrum consisting of five fused spinal vertebrae whereas the innominate bone on each side develops by the joining of the ilium, ischium and pubis. The pubic parts of the innominate bones meet in the midline anteriorly at the pubic symphysis, thereby completing the circle.
