Anatomy of the Spine

Anatomy of the Spine

Spinal column
Click image to enlarge

The vertebral column, also called the backbone, is made up of 33 vertebrae that are separated by spongy disks and classified into 4 distinct areas. The cervical area consists of 7 bony parts in the neck; the thoracic spine consists of 12 bony parts in the back area; the lumbar spine consists of 5 bony segments in the lower back area; 5 sacral* bones; and 4 coccygeal* bones (the number of coccygeal bones can vary from 5 to 3).

(* By adulthood, the 5 sacral vertebrae fuse to form 1 bone, and the 4 coccygeal vertebrae fuse to form 1 bone.)

© 2000-2018 The StayWell Company, LLC. 800 Township Line Road, Yardley, PA 19067. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

The StayWell Company, LLC provides a Privacy Policy and Terms and Conditions of Use, which apply to the Learning Center section of the Middlesex Health website.

Explore Our Learning Center