The adult human skeletal system consists of 206 bones ... The axial skeleton totals 80 bones, consisting of the vertebral column, the rib cage and the skull. The appendicular skeleton totals ...

All of the cervical vertebrae flex and extend the neck, but some have additional special functions, including: C1: The first vertebra in the column closest to the skull is also known as the atlas ...

The spine, or backbone, is a long column of bones that runs down the center of a person’s back. It is essential for many functions, such as movement, support, and protecting the spinal cord.

While muscles and other tissues assist, the lowest portion of the vertebral column—known as the lumbar spine—provides support as you bend, twist, and extend your upper body. In addition to ...