The cartilaginous skeleton of an elasmobranch fish does not heal.

@article{Ashhurst2004TheCS,
  title={The cartilaginous skeleton of an elasmobranch fish does not heal.},
  author={Doreen E. Ashhurst},
  journal={Matrix biology : journal of the International Society for Matrix Biology},
  year={2004},
  volume={23 1},
  pages={15-22}
}
The inability of articular cartilage to heal satisfactorily is becoming, with ageing populations, an important medical problem. One question that has not been raised is whether a mechanism for the repair of cartilage evolved in animals with cartilaginous skeletons. Fin rays of dogfish were cut and the fish maintained for up to 6 months. The initial inflammatory reaction around the cut rays lasts for 2 weeks. By 4 weeks the cut ends are covered by fibrous tissue. At 12 weeks some areas of… CONTINUE READING
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