Now, let's move on to function number three insulation and thermal regulation. So recall that the hypodermis, the subcutaneous layer, contains our adipose cells. And what these adipose cells do is they create a layer of insulation and that basically keeps us cool in the summer days and keeps us warm in the winter nights. Now, what about thermal regulation? Well, recall that our body is in a constant state of homeostasis so it does what it can to maintain homeostasis. And one of the things that it does is it needs to actually maintain a constant core temperature.