Transferring heat

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The body cools itself using one of the following methods to transfer heat:

Evaporation (sweating). This method is important when the air is warmer than . Evaporation during strenuous exercise helps the body lose most of the excess heat produced by the activity. Sweating is not as effective in a humid environment. Sweat that drips off the body does not transfer as much heat away from the body as sweat that evaporates from the skin.
Radiation (similar to heat leaving a woodstove). This occurs when the air temperature is lower than body temperature. Radiation helps cool the body but is less effective when the air is warmer.
Conduction (such as sleeping on cold ground or swimming in cool water). Cool air does not help the body cool very quickly. However, the body can quickly lose heat when it is exposed to cool water.
Convection (such as sitting in front of a fan or standing in the wind). Convection helps cool the body but is less effective when the air is warmer.

Credits

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Author	Jan Nissl, RN, BS
Editor	Susan Van Houten, RN, BSN, MBA
Associate Editor	Tracy Landauer
Primary Medical Reviewer	William M. Green, MD - Emergency Medicine
Specialist Medical Reviewer	H. Michael O'Connor, MD - Emergency Medicine
Last Updated	October 7, 2008

Last updated:	October 07, 2008
Author:	Jan Nissl, RN, BS
Reviewed By:	William M. Green, MD - Emergency Medicine, H. Michael O'Connor, MD - Emergency Medicine
Editors:	Susan Van Houten, RN, BSN, MBA, Tracy Landauer

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