In human anatomy, The Atlas is the 1st cervical vertebra. It is also called C1 vertebra. This is the most superior vertebra of vertebral column.
It has the following parts: (1) Anterior arch (2) Posterior arch (3) Lateral mass (a) The superior articular facets (b) The inferior articular facets (4) Transverse processes (5) Transverse foremen (6) Vertebral foramen