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