WOUND

a break in the continuity of any bodily tissue due to violence, where violence is understood to encompass any action of external agency, including, for example, surgery. Within this general definition many subdivisions are possible, taking into account and grouping together the various forms of violence or of tissue damage. The most important distinction is between open and closed wounds. Open wounds are those in which the protective body surface (the skin or mucous membranes) has been broken, permitting the entry of foreign material into the tissues. In closed wounds, by contrast, the damaged tissues are not exposed to the exterior, and the process of repair can take place without the interference that contamination always brings, in greater or lesser degree. Further divisions may be made on the basis of the mode of production of the wound.