The spinal column, better known as your backbone, is a strong yet flexible multipurpose structure. It is designed to protect the spinal cord, absorb and distribute shock, while supporting the weight of your head and torso and allows you to move in many directions.
A joint is where 2 or more bones are joined. Joints allow motion (articulation). The joints in the spine are commonly called facet joints, and you can learn about the anatomy of spinal joints in this article.