Vertebral Column.

Regions and Curvatures, labeled. (A) Color-coded anterior aspect of vertebral column. blue, Cervical vertebrae; green, thoracic vertebrae; purple, lumbar vertebrae; red, sacrum; yellow, coccyx. (B) Lateral aspect of vertebral column, showing regions and curvatures. (C) Midsagittal MRI scan of cervical and thoracic spine. Note curves and spinal cord protected by vertebrae.