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Basic Thermoregulation

Chapter

Abstract

The term “body temperature” is often ill defined and requires careful consideration. The body can be crudely divided into two regions [2], namely the “core” and the “shell” (Fig. 110.1). The “core” is made up of the contents of the skull, the thorax, and the abdomen. The “shell” includes the skin, the subcutaneous tissues, and the limbs. The temperature of the “core” is maintained close to 37°C (98.6°F) at most times, whereas the temperature of the “shell” fluctuates widely according to the environmental conditions. There are variations of temperature within the body core. For example, the temperature in the human esophagus at heart level may be up to 1°C (1.8°F) lower than that in the rectum. This difference does not seem to be due to bacterial action in the colon and rectum, since it has been shown to persist in a patient who had a colostomy and in whom the distal side of the colostomy had been sterilized with antibiotics. Oral temperatur, properly taken, and esophageal temperature follow rapid changes in arterial blood temperature more closely than does rectal temperature, in which the is large thermal lag.

Keywords

Heat Exchange Skin Temperature Core Temperature Thermal Comfort Sweat Gland 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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