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The discs have a tough outer covering of cartilage that provides support (the annulus fibrosus) and a soft, jellylike center that provides the cushioning (the nucleus pulposus). The intervertebral discs have the following functions: They provide cushioning for the vertebrae and reduce the stress caused by impact. By keeping the vertebrae separated from each other, they act as a type of shock absorber for the spine.
The function of the central disk on the starfish is to regrow an appendage if one is cut off.plit and merge into it. Answered by The Community. Making the world better, one answer at a time. The function of the central disk on the starfish is to regrow an appendage if one is cut off. It is where the arms of the starfish originate.