Orthopaedic Spine Center
450 Broadway St. | MC6342
Redwood City, CA 94063
For Adult Patients: (650) 725-5905

Anatomy of the Spine

The vertebral column, also called the backbone, is made up of 33 vertebrae that are separated by spongy discs and classified into four distinct areas. The cervical area consists of seven bony parts in the neck; the thoracic spine consists of 12 bony parts in the back area; the lumbar spine consists of five bony segments in the lower back area; five sacral* bones; and four coccygeal* bones.

(* By adulthood, the 5 sacral vertebrae fuse to form one bone, and the 4 coccygeal vertebrae fuse to form one bone.)

 
Video: Spinal Anatomy
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