And if that heat is not expelled by that body, it will increase the core temperature. And what that means is our body must actually get rid of that heat. And what it does is it takes the heat and it stores that heat in our blood. 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.