in plastic surgery,excess tissue may be removed,or skin tissue from one part of the body may be added to another part where it is needed. when the skin is removed from one past of the body and grafted to another past,usually only the top two layers are used. This is because the skin then has a bottles chance to live in is new location. New blood vessels from and circulation keep the skin alive. when thicker layers of skin are grafted,as when someone has had a bad accident or severe burns,the chances of the new skin living are not as good. When it does,however,it is likely to look more natural