And as the blood actually travels in these blood vessels in the dermis section of our skin, this blood radiates the heat outward to the outside of our skin. Now, we also have the sweat glands which basically produce our sweat, which consists predominantly of water. And as the water gets onto the surface of our skin, the heat that basically rises and radiates from the moving blood in our blood vessels is used to actually vaporize that water from our skin. And this is an endothermic process. In fact, it's a very endothermic process because water has a high specific heat capacity. And so this is an important way by which we regulate the core temperature and homeostasis of our body.