In medical parlance, a graft is the transplant of a foreign organ into the body of another person, performed because they are lacking a vital organ, or because their organ needs to be healed to start functioning properly, such as is the case with kidney
transplants for patients on dialysis
. There are two types of grafts, or transplants: autotransplantation, where the graft comes from the same patient; and allotransplantation, where it comes from a donor. Grafts can be removed from living organisms (kidneys
, bone fragment, skin, and so on) or after death (heart, lungs, pancreas
, cornea, and so on).