Fig. 39-14. The neural arch and centrum (left half of figure), and the vertebral arch and body (right half). The terms centrum and neural arch refer to those parts of a vertebra ossified from primary centers. The terms vertebral arch and body are descriptive terms generally applied to adult vertebrae. The body of a vertebra includes the centrum and part of the neural arch. The vertebral arch, therefore, is less extensive than the neural arch. Note that the rib articulates with the neural arch and not with the centrum. Click for high resolution image.