Sheathing of collagen fibrils in human intervertebral discs.

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Duration: 3 min 30 s
Description: In 25 human intervertebral discs studied by electron microscopy, sheathing collagen-like fibrils by electron-dense cylinders was observed. The sheaths consisted of layers of dense granules 3 to 12 times the diameter of the enclosed collagen-like fibrils, and they appeared to be more frequent in older discs.
Joseph A. Buckwalter; Jerry A. Maynard; RR Cooper
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