Pyramid Science

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Tuesday, February 24, 2015

Body Heat


The whole concept of retaining body heat is a fascinating one. Reptiles are cold-blooded creatures and very rarely exist in cold climates (Siberian newt). They have no way of generating body heat for survival and need warm surroundings: exposure to the heat from The Sun and hibernate in cold winters.

Siberian salamander - deep freeze

Mammalian (human) creatures are warm-blooded and this means they are capable of generating the necessary heat internally for body chemistry to function. When a wind (stream of air) passes over a surface, it removes heat. The use of a coat for humans simply acts as a barrier to retain body heat and slow the loss of warmth from the system.

Warm blooded creatures are all much the same in this respect.

The natural barrier to heat loss for many mammals is hair growth. This also has a major benefit of minimising heat loss by preventing the wind contacting the surface in the first place.


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