Abstract: An organ perfusion and preservation system for use in preserving an organ from a donor, may include a fluid reservoir, a heat exchanger in fluid communication with the fluid reservoir and configured to selectively raise and lower a temperature of a perfusion fluid, an oxygenator configured to oxygenate the perfusion fluid, an inflow pump in fluid communication with the fluid reservoir and the oxygenator, a fluid inflow line configured to transport perfusion fluid from the oxygenator to the organ, a fluid outflow line configured to transport perfusion fluid away from the organ and back to the reservoir, an outflow pump in fluid communication with the fluid outflow line and the fluid reservoir, and a controller operatively connected to the inflow pump, the outflow pump, and the heat exchanger, wherein the controller is configured to select parameters to reversibly heat and reversibly cool the organ.