What is the total number of cervical vertebrae in the human spine?

The human spine comprises a total of seven cervical vertebrae, which are labeled C1 through C7. These vertebrae form the uppermost part of the vertebral column and are critical for supporting the head, allowing flexibility, and protecting the spinal cord. The numbering of these vertebrae starts from the top, with C1 commonly referred to as the atlas, which supports the skull, while C2 is called the axis, allowing for the rotation of the head. This structured set of seven cervical vertebrae is consistent across most humans, providing both anatomical stability and mobility.