Discs separate the twenty-four vertebrae of the spine from each other. These thick pads of fibrocartilage consist of two different parts: a fibrous outer layer and a gel-like center. Discs connect the spinal vertebrae, give the spine flexibility, and serve as shock absorbers—all very important functions. Unfortunately, these discs are prone to injury (some estimates claim that 2 in 5 adults will have disc problems at some point).
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