So once again, every exothermic process in the body produces excessive energy that must be dissipated by the body to prevent overheating. What happens is the blood vessels that run in the dermis of our skin, it can actually expel some of that energy, some of that heat via the process of radiation. So this energy, this heat simply rises to the top portion of our skin. Now, the skin can also expel heat via the endothermic process of evaporation. So sweating takes place and that rising heat basically vaporizes evaporates that water and endothermic process. And that's how we basically regulate the amount of energy in our body by using our heat.