Transplantation surgery is a human surgical procedure in which a body tissue or organ is transferred from a giver to a recipient or from one part of the body to the next. Kidneys, liver , heart, lungs, pancreas, digestive tract, and thymus are species that can be transplanted. Sorts of surgical transplantation include Xenograft and xenotransplantation. Organ donors can live through circulatory death, mind dead, or dead. Tissue can be retrieved from donors going through circulatory death, and mind going through the end of the pulse up to 24 hours. Not like organs at all, most tissues can be preserved and stored for up to five years, meaning they can be "banked" Transplantation poses numerous bioethical concerns like the nature of death, whether and when the transplantation will take place.