Tissue repair occurs in two major ways: by regeneration and by fibrosis. Regeneration is the replacement of destroyed tissue by the same kind of cells. Fibrosis involves repair by dense connective tissue by the formation of scar tissue. Which occurs would depend on the type of tissue damaged and the severity of the injury. First the capillaries become very permeable. Then the granulation tissue forms. Finally the surface epithelium regenerates. Scar tissues do not have the ability to perform the normal functions of the tissue it replaces.
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