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There are several different temperatures of the body as well as places where one can measure the temperature. It can be doneorally (in the mouth, under the tongue), under the armpit, in the ear orrectally (in the rectum). The normal body temperature is known as euthermia ornormothermia, and it depends on the place of the measurement, the level ofphysical activity the person had and the time of the day. No one can say exactnumbers that are recognized as the normal body temperature for everyone, at anyplace or any time of the day.

Core Body Temperature

Core temperature is the term describing the temperature ofthe organs and other structures deep inside the body. This so-called operatingtemperature is maintained in narrow ranges, since it is necessary to remainconstant for various enzyme reactions in the body. Average core body temperatureis about 37.0°C (or 98.6 °F).

When a person experiences hyperthermia (increased core temperature)or hypothermia (decreased core temperature) and this condition gets prolonged –there are serious chances that this person won’t survive that condition.

The most punctuate way to measure core temperature is therectal measurement, which is the most accurate, but some also recommend usinginfrared sensors to measure temperature in the ear. Oral measurements aren’tvalid in estimating the core temperature, since they could be affected by thedrinking and mouth breathing.

Ranges of Normal Body Temperatures

If the person measures his/her temperature under the tongueit will probably be about 36.1 and 37.5°C, or 96.9 and 99.5°F. The armpitreadings are about 36.6°C (98.6°F).

As perfectly normal for adult men and women, doctors acceptthe values of 33.2–38.2 °C (92–101 °F) for oral and 34.4–37.8 °C (94–100 °F)for rectal temperature. In the Tympanic cavity the temperature is around35.4–37.8 °C (96–100 °F) and under the armpit it is found to be from 35.5 to 37.0°C (96–99 °F).

What Affects Body Temperature

As we already mentioned, our body reacts to the time of theday and the activity at the moment of the temperature measurement. Sleeping orbeing awake and some other psychological factors, but also the condition inwhich we are (such as being cold, sleepy or even hungry or well fed) determinethe temperature of the body.

When talking about the daily temperature changes, we arecoldest (36.4 °C) in the very early morning, around 4am, or some 2 hours beforethe usual waking up time. In the afternoon, somewhere around 4 to 6pm our bodyis warmer than at any other time of the day, with the temperature of about 37.5°C.

Although there are some daily changes in every person’s bodytemperature during the day, they are never more than 0.5 °C (0.9 °F) between thehighest and lowest number.

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