<P> Temperature control (thermoregulation) is part of a homeostatic mechanism that keeps the organism at optimum operating temperature, as it affects the rate of chemical reactions . In humans, the average internal temperature is 37.0 ° C (98.6 ° F), though it varies among individuals . However, no person always has exactly the same temperature at every moment of the day . Temperatures cycle regularly up and down through the day, as controlled by the person's circadian rhythm . The lowest temperature occurs about two hours before the person normally wakes up . Additionally, temperatures change according to activities and external factors . </P> <P> In addition to varying throughout the day, normal body temperature may also differ as much as 0.5 ° C (0.9 ° F) from one day to the next, so that the highest or lowest temperatures on one day will not always exactly match the highest or lowest temperatures on the next day . </P> <P> Normal human body temperature varies slightly from person to person and by the time of day . Consequently, each type of measurement has a range of normal temperatures . The range for normal human body temperatures, taken orally, is 7002309950000000000 ♠ 36.8 ± 0.5 ° C (7002309927777777777 ♠ 98.2 ± 0.9 ° F). This means that any oral temperature between 36.3 and 37.3 ° C (97.3 and 99.1 ° F) is likely to be normal . </P> <P> The normal human body temperature is often stated as 36.5--37.5 ° C (97.7--99.5 ° F). In adults a review of the literature has found a wider range of 33.2--38.2 ° C (91.8--100.8 ° F) for normal temperatures, depending on the gender and location measured . </P>

What is the normal range for oral temperature
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