Nucleus pulposus is found in

The head of the rib which articulates with the transverse process of thoracic vertebrae is called

The Haversian system is found in the:

In humans,out of $X$ pairs of ribs,only $Y$ pairs are true ribs. Select the option that correctly provides the values of $X$ and $Y$ and their explanation.

In humans,the sacrum is formed by the fusion of how many vertebrae?

Select the correct function of the vertebral column in humans.