Review: cornification, morphogenesis and evolution of feathers

  title={Review: cornification, morphogenesis and evolution of feathers},
  author={Lorenzo Alibardi},
Feathers are corneous microramifications of variable complexity derived from the morphogenesis of barb ridges. Histological and ultrastructural analyses on developing and regenerating feathers clarify the three-dimensional organization of cells in barb ridges. Feather cells derive from folds of the embryonic epithelium of feather germs from which barb/barbule cells and supportive cells organize in a branching structure. The following degeneration of supportive cells allows the separation of… CONTINUE READING


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