<prompt> Axis is the name for:IV cervical vertebraIII cervical vertebraII cervical vertebraI cervical vertebra  <response>: Second cervical vertebra axisPresence of odontoid process.Transverse processes are small and lack the anterior tubercle.Anterior margin of the inferior surface of the body projects downwards to a considerable extent.Foramen transversarium is directed superolaterally expand in typical vertebrae it is directed verticallyInferior surface presents a deep and wide inferior vertebral notch placed in front of the inferior articular process. The superior vertebral notch is shallow and is present behind the superior articular process.Key concept:Second cervical vertebra is called the axis. it is identified by the presence of the dens or odontoid process which is a strong, tooth-like process projecting upwards from the body. The dens is usually believed to represent the centrum or body of the atlas which has fused with the centrum of the axis. 