Health Library

Health Library

Anatomy of the Spine

Anatomy of spinal column with vertebrae

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.)

 

Anatomy of the Spine - WellSpan Health

Online Medical Reviewer: Bellendir, Trina, MSPT, CLT
Online Medical Reviewer: MMI board-certified, academically affiliated clinician
© 2014 WellSpan Health. All Rights Reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

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