Normal human body temperature, also known as normothermia or euthermia, depends upon the place in the body at which the measurement is made, the time of day, as well as the activity level of the person. Despite what many schoolchildren are taught, there is no single number that represents an ideal temperature for all people, under all circumstances, at any time of day, and using any place of measurement. Instead, the body temperature of a healthy person changes slowly but constantly during the course of the day.
|Commonly accepted average body temperature.|
Different parts of the body have different temperatures. The commonly accepted average core body temperature (taken internally) is 37.0 °C. The typical oral (under the tongue) measurement is slightly cooler, at 36.8°, and temperatures taken in other places (such as under the arm or in the ear) produce different typical numbers. Although some people think of these averages as representing the normal or ideal temperature, a wide range of temperatures has been found in healthy people.