Tooting to Survive

The human body is a machine and just like any other machine, the conservation of energy, even in the form of heat, must be conserved for the machine to function efficiently. The body has many mechanisms to regulate this heat energy loss.

-Hair on the top of the head acts to insulate rising body heat.

-Projections in the nasal cavity act to condition the air before it reaches the lungs by moistening and warming it, this warmth is then marginally taken up again during exhalation if the air is breathed out the nose.  

-Adipose tissue builds primarily around the bodies center of mass to insulate. 

-Vasoconstriction (a reduction in the diameter of the arteries) reduces blood flow to extremities during extreme cold to prevent heat loss. 

Mother nature might have missed an opportunity however. Farting as a response to decreased body temperature, could potentially be a mechanism to warn the body. Not only would the air that is expelled warm the skin on the butt, but it would also increase the density of the body, allowing body heat to be used more efficiently.