Example: if you die in a field and all your mustles “disolve?” And all thats left of your body are bones, would the disks also be there?
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The discs decompose. Only bone remains. Yes, discs need to be in a spine model. Optional is ligaments that surround the spine. It depends on the purpose of your model.
There are lots of medical illustrations of discs available online. Check out illustrations by Dr. Frank Netter. You’ll see that they lie between the vertebral bodies (the round blocks that comprise the front of the spinal column when stacked up). Depending on how detailed you want to be, the ends of the vertebral bodies that touch the disc are layered in cartilage (called the cartilage endplates). The outer ring of the disc is not cartilage, but multiple layers of collagen fibers oriented in different directions like the ply layers of an automobile tire. In Latin, it is the annulus fibrosus (“fibrous ring”). The middle of the disc is gelatinous, called the nucleus pulposus (fleshy core), and contains living cells that make and maintain the gelatinous material.
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