A medical simulator having a heat exchanger configured to transfer heat from electronics and other components of the medical simulator to simulated blood of a simulated vascular system of the medical simulator. The heated simulated blood can be circulated throughout the simulated vascular system to provide more realistic training for medical practitioners by increasing the temperature of the skin of the medical simulator to a more realistic temperature. Circulating the heated simulated blood can also serve to cool the electronics and other components, while simultaneously transferring the heat out from the vascular system into an environment outside of the medical simulator.