Chaos is the unformed, the unpredictable, the unexpected. Body heat is part of chaos. It does not have a shape that lasts through time. It is not predictable. Chaos is all the random, patternless, haphazard stuff in our universe.
Heat is a form of chaos.
Heat is an essential part of all living things. Life cannot exist without the heat that is the random movement of atoms. You know that if you put a thermometer in your mouth, you are not going to get a reading of zero. If you had no heat in your body, you would be dead. If heat is chaos, and life cannot exist without heat, then life cannot exist without chaos.