1 — Anterior articular facet; 2 — Superior articular surface; 3 — Transverse process; 4 — Dens axis [CII]; 5 — Vertebral foramen; 6 — Spinous process; 7 — Vertebral arch; 8 — Inferior articular process; 9 — Foramen transversarium; 10 — Vertebral body; 11 — Posterior articular facet;
12 — Apex (Dens)