The bone labeled $P$ in the given image is formed by the fusion of how many vertebrae?

An elderly woman slipped in the bathroom and had severe pain in her lower back. After $X-ray$ examination,doctors told her it is due to a slipped disc. What does that mean? How does it affect our health?

The smallest bone in the skeleton of a rabbit or a human is:

The function of prezygapophysis and postzygapophysis is to:

Floating ribs of the thoracic cage are

In the rib cage formation,which of the following is not used?