Fat cells (or adipocytes) have special cells in the body that are mostly filled with triacylglycerol in the form of drops of oil. Fat cells fill adypocyte tissue (or fat) that is in many places in the body. I will mention only two of them - the holes in the abdomen and the skin. Fat cells are our body temperature regulator, and our energy storage. In other words, they are the result of millions of years of evolution and help us feel warm and full.
Long - long ago when we lived in caves and we did not know whether the food is "to be delivered by noon (or all), our bodies ready fat as an insurance policy. If there is no food, we were able to reduce this energy reserve and survival. Also, fat in the skin, keep warm in our bodies as they still do today.
