The spine (columna vertebralis) is a part of the vertebrate skeleton. It consists of a number of vertebrae (33 or 34 in humans) with cartilaginous spinal discs between them. The medulla (spinal cord) runs through openings in the vertebrae. The skull, and in some vertebrate species also the pelvis, ribcage, and limb bones, are attached to the spine.

Read more about the spine in our article.