The intervertebral disc is a:

The $8^{th}$ and $9^{th}$ ribs are known as false ribs because their external portions are attached to

Which of the following structures are not common to both atlas and axis vertebrae?

Statement-$I$: Each rib is a thin flat bone connected dorsally to the vertebral column and ventrally to the sternum.
Statement-$II$: The $8^{th}$,$9^{th}$,and $10^{th}$ pairs of ribs do not articulate directly with the sternum but join the seventh rib with the help of hyaline cartilage. These are called floating ribs.

Nucleus pulposus is

The part of the axial skeleton that includes the upper jaw,lower jaw,hyoid apparatus,and gill arches is called: