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The **second cervical (C2) vertebra** is called the **axis**, because it serves as the axis for rotation when turning the head toward the right or left. The axis resembles typical cervical vertebrae in most respects, but is easily distinguished by the dens (odontoid process), a bony projection that extends upward from the vertebral body. The dens joins with the inner aspect of the anterior arch of the atlas, where it is held in place by transverse ligament.
*LICENSES AND ATTRIBUTIONS
CC licensed content, Shared previously, The Vertebral Column, Authored by: OpenStax College. License: CC BY: Attribution. License Terms: Download for free at https://cnx.org/contents/4CMef3D9@4/The-Vertebral-Column*
