Tissue transplantation is the transfer of essential tissue from one location to another with in the same individual or from one person to the other for the purpose of replacing patients' damaged tissue or sometimes absent tissue. Many diseases that will not be readily curable by any existing therapies can be cured by this method of this tissue transplantation technique. There are different types of tissue transplantations and the most commonly transplanted tissues include cornea, skin, heart valves, nerves, and veins.