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perichondrium vs. periosteum

perichondrium

[ per-i-kon-dree-uhm ]
noun,
  1. the membrane of fibrous connective tissue covering the surface of cartilages except at the joints.

periosteum

[ per-ee-os-tee-uhm ]
noun,
  1. the normal investment of bone, consisting of a dense, fibrous outer layer, to which muscles attach, and a more delicate, inner layer capable of forming bone.