<prompt> All are factors of poor wound healing except -Young ageInfectionZinc deficiencyVitamin D deficiency  <response>: Answer- A. Young ageSystemic factorsPoor nutrition protein deficiency, vitamin C deficiencyMetabolic abnormalities Diabetes mellitus.Poor circulatory status Inadequate blood supplyHormones, e.g. glucocoicoidsB. Local factorsInfection is the single most impoant factor.Mechanical factors, e.g. early mobilization.Foreign bodies unnecessary sutures, fragments of steel or glass.Wound in poorly vaculatized area, e.g. foot. 