The spine is composed of 33 interlocking bones called vertebrae. The lumbosacral region of the spine consists of 5 lumbar vertebrae and the sacrum (5 bones joined together).
Current as of: March 21, 2017
Author: Healthwise Staff
Medical Review: William H. Blahd, Jr., MD, FACEP - Emergency Medicine & Adam Husney, MD - Family Medicine
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