Why would a system such as the countercurrent heat exchanger evolve?
A. Reduce the loss of heat by distal appendages
B. Maintain the continuity of nutrients to distal appendages
C. Maintain blood pressure throughout the distal appendages
D. Reduce the loss of fur by distal appendages

This link provides info on the geothermal heat exhchanger system. http://en.wikipedia.org/wiki/Geothermal_…
Its very much the basic exchanger system.
Can anyone explain to me how heat is extraced from the house during the cooling process??

I’m dead in the middle of a bio-med project and I cant find the answer anywhere.