"to give the most accurate assessment of core body temperature, particularly in hypothermia. In the early 2000s, ingestible thermistors in capsule form were produced, allowing the temperature inside the digestive tract to be transmitted to an external receiver; one study found that these were comparable in accuracy to rectal temperature measurement. In the 19th century, most books quoted ""blood heat"" as 98 °F, until a study published the mean (but not the variance) of a large sample as . Subsequently that mean was widely quoted as ""37 °C or 98.4 °F"" until editors realised 37 °C is closer to 98.6"
"Human body temperature Normal human body temperature, also known as normothermia or euthermia, is the typical temperature range found in humans. The normal human body temperature range is typically stated as . Individual body temperature depends upon the age, exertion, infection, sex, and reproductive status of the subject, the time of day, the place in the body at which the measurement is made, and the subject's state of consciousness (waking, sleeping or sedated), activity level, and emotional state. It is typically maintained within this range by thermoregulation. Taking a person's temperature is an initial part of a full clinical examination."
"°F than 98.4 °F. Dictionaries and other sources that quoted these averages did add the word ""about"" to show that there is some variance, but generally did not state how wide the variance is. Human body temperature Normal human body temperature, also known as normothermia or euthermia, is the typical temperature range found in humans. The normal human body temperature range is typically stated as . Individual body temperature depends upon the age, exertion, infection, sex, and reproductive status of the subject, the time of day, the place in the body at which the measurement is made, and the subject's"
"to be normal. The normal human body temperature is often stated as . In adults a review of the literature has found a wider range of for normal temperatures, depending on the gender and location measured. Reported values vary depending on how it is measured: oral (under the tongue): (), internal (rectal, vaginal): . A rectal or vaginal measurement taken directly inside the body cavity is typically slightly higher than oral measurement, and oral measurement is somewhat higher than skin measurement. Other places, such as under the arm or in the ear, produce different typical temperatures. While some people think"
"like bats and hummingbirds, which temporarily reduces their high metabolic rates to conserve energy. Previously, average oral temperature for healthy adults had been considered , while normal ranges are to . In Poland and Russia, the temperature had been measured axillary. 36.6 °C was considered ""ideal"" temperature in these countries, while normal ranges are 36 °C to 36.9 °C. Recent studies suggest that the average temperature for healthy adults is (same result in three different studies). Variations (one standard deviation) from three other studies are: Measured temperature varies according to thermometer placement, with rectal temperature being 0.3–0.6 °C (0.5–1 °F)"
"than peripheral temperatures. Fever is generally agreed to be present if the elevated temperature is caused by a raised set point and: In healthy adults, the range of normal, healthy temperatures for oral temperature is , for rectal it is , for tympanic membrane (the ear drum) it is , and for axillary (the armpit) it is . Harrison's principles of internal medicine defines a fever as a morning oral temperature of >37.2 °C (>98.9 °F) or an afternoon oral temperature of >37.7 °C (>99.9 °F) while the normal daily temperature variation is typically 0.5 °C (0.9 °F). Normal body"
"reference points became popular following the work of Anders Celsius and these fixed points were adopted by a committee of the Royal Society led by Henry Cavendish in 1776. Under this system, the Fahrenheit scale is redefined slightly so that the freezing point of water is exactly 32 °F, and the boiling point is exactly 212 °F or 180 degrees higher. It is for this reason that normal human body temperature is approximately 98° (oral temperature) on the revised scale (whereas it was 90° on Fahrenheit's multiplication of Rømer, and 96° on his original scale). The Rankine temperature scale was"
"between the periphery and the core to control heat loss from the surface of the body. Lastly, the organism can show insulation adjustments; a common example being “goosebumps” in humans where hair follicles are raised by pilomotor muscles, also shown in animals’ pelage and plumage. The thermoneutral zone describes a range of temperatures of the immediate environment in which a standard healthy adult can maintain normal body temperature without needing to use energy above and beyond normal basal metabolic rate. Its value is 25 - 30 degrees Celsius (77 - 86 degrees Fahrenheit) for a naked man, standing upright, in"
"still air. Note this is for a resting human and does not allow for shivering, sweating or exercising. Even with light clothing, radiation and convection losses are dramatically reduced, effectively reducing the TNZ. Hence, a comfortable temperature in a heated building may be 18 - 22 degrees Celsius (64.4 - 71.6 degrees Fahrenheit). Humans produce an obligatory ~100 watts of heat energy as a by-product from basic processes like pumping blood, digesting, breathing, biochemical synthesis and catabolism etc. This is comparable to a common incandescent light-bulb. Hence, if the body were perfectly insulated, core temperature would continue to increase until"
"40 and 10 are not only fundamental to the Earth, the Moon and the Sun, but also to the human body and water. In the water-based Celsius temperature measurement system, which is directly linked to base-10 numeration, the average human body temperature is 36.6 degrees (according to Russian medicine), whereas the maximal density of water, Tristan says, is 4.0 degrees (whereas it is in fact 3.98 degrees ). More recently Butler and Knight claimed that, on a scale where the absolute zero is defined as being minus 1,000 degrees, water boils at the temperature of 366 degrees, an ""utterly remarkable"""
"temperature is also one of the classic phase markers for measuring the timing of an individual's Circadian rhythm. Changes to the normal human body temperature may result in discomfort. The most common such change is a fever, a temporary elevation of the body's thermoregulatory set-point, typically by about 1–2 °C (1.8–3.6 °F). Hyperthermia is an acute condition caused by the body absorbing more heat than it can dissipate, whereas hypothermia is a condition in which the body's core temperature drops below that required for normal metabolism, and which is caused by the body's inability to replenish the heat that is"
"in Stuttgart, Germany, he immigrated to the U.S. in 1947 and became a naturalized citizen in 1955. He worked from 1947 to 1970 in the bioenergetics division at the Naval Medical Research Center in Bethesda, Maryland. The temperature can be measured in various locations on the body which maintain a fairly stable temperature (mainly sub-lingual, axillary, rectal, vaginal, forehead, or temporal artery). The normal temperature varies slightly with the location; an oral reading of 37 °C does not correspond to rectal, temporal, etc. readings of the same value. When a temperature is quoted the location should also be specified. If"
"normal, a condition known as hyperthermia occurs. For humans, this occurs when the body is exposed to constant temperatures of approximately , and with prolonged exposure (longer than a few hours) at this temperature and up to around death is almost inevitable. Humans may also experience lethal hyperthermia when the wet bulb temperature is sustained above for six hours. The opposite condition, when body temperature decreases below normal levels, is known as hypothermia. It results when the homeostatic control mechanisms of heat within the body malfunction, causing the body to lose heat faster than producing it. Normal body temperature is"
"change according to activities and external factors. In addition to varying throughout the day, normal body temperature may also differ as much as 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. 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 (). This means that any oral temperature between is likely"
"databases, the group has conducted hundreds of cohort, case-control, and health policy analyses. For example, they have developed several accurate risk-stratification models which permit accurate comparisons across divergent patient groups (i.e., risk-adjusted comparisons amongst hospitals). Body temperature is normally tightly regulated to about 37 °C (98.6 °F), with women being slightly warmer than men. The Consortium is perhaps best known for perioperative thermoregulation, with members having published far more on the subject than all other investigators combined. In a series of several hundred studies, for example, Consortium members identified dose-dependent effects of every major anesthetic and sedative on thermoregulatory control,"
"later on in life. Food preference ranges through male/female, and younger/older Thermal comfort is a satisfaction of the ambient air temperature and humidity. Psychologists devised a study to determine the most comfortable temperature. The study had people answering a survey as the temperature changed around them. From the surveys, psychologist found many people had no opinion of a range of temperature.This was labeled temperature neutrality, which is the rate as the person metabolism is shifting the same rate as the surrounding temperature. The average comfortable temperature is 30 degrees Celsius. Temperatures too hot (35 °C and above) and temperatures too"
"to variations in barometric pressure. For example, an altitude change of only 28 cm (11 in) causes the boiling point to change by one millikelvin. Celsius The Celsius scale, also known as the centigrade scale, is a temperature scale used by the International System of Units (SI). As an SI derived unit, it is used by all countries except the United States, the Bahamas, Belize, the Cayman Islands and Liberia. It is named after the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale. The degree Celsius (°C) can refer to a specific temperature on the Celsius scale"
"lethal core temperatures were achieved. Conversely, we are normally in surroundings that are considerably colder than body core temperature (37 degrees Celsius or 98.6 degrees Fahrenheit) and hence there is a large gradient for thermal energy flow from the core to the surroundings. Therefore, the body must ensure it can also minimize the loss of heat to around 100 watts, if it is to maintain core temperature. In short, the skin must be able to get rid of 100 watts of heat in relatively warm environments, but also ensure that it does not lose too much more than this in"
"of 101,325 pascals (Atmospheric pressure), 1.0 bar (i.e., 100,000 pascals), 14.73 psia, or 14.696 psia and the ""standard"" temperature is variously defined as 68 °F, 60 °F, 0 °C, 15 °C, 20 °C, or 25 °C. The relative humidity (e.g., 36% or 0%) is also included in some definitions of standard conditions. In Europe, the standard temperature is most commonly defined as 0 °C, but not always. In the United States, the standard temperature is most commonly defined as 60 °F or 70 °F, but again, not always. A variation in standard temperature can result in a significant volumetric variation"
"core body temperature reaches conditions of hyperthermia, above 37.5–38.3 °C (99.5–100.9 °F), or hypothermia below 35.0 °C (95.0 °F). Buildings modify the conditions of the external environment and reduce the effort that our body needs to do in order to stay stable at a normal human body temperature, important for the correct functioning of our physiological processes. The roman writer Vitruvius actually linked this purpose to the birth of Architecture. David Linden also suggests that the reason why we associate tropical beaches with paradise is because in those environments is where our bodies need to do less metabolic effort to"
"convection is driven by the movement of fluids over the surface of the body. This convective fluid can be either a liquid or a gas. For heat transfer from the outer surface of the body, the convection mechanism is dependent on the surface area of the body, the velocity of the air, and the temperature gradient between the surface of the skin and the ambient air. The normal temperature of the body is approximately 37 °C. Heat transfer occurs more readily when the temperature of the surroundings is significantly less than the normal body temperature. This concept explains why a"
"divisible into many fractions. It is because of the scale's redefinition that normal body temperature today is taken as 98.6 degrees, whereas it was 96 degrees on Fahrenheit's original scale. The Fahrenheit scale was the primary temperature standard for climatic, industrial and medical purposes in English-speaking countries until the 1970s, nowadays replaced by the Celsius scale long used in the rest of the world. Daniel Gabriel Fahrenheit Daniel Gabriel Fahrenheit FRS (; ; 24 May 1686 – 16 September 1736) was a Dutch-German-Polish physicist, inventor, and scientific instrument maker. Fahrenheit was born in Danzig/Gdańsk, a predominantly German-speaking Hanseatic city in"
"types. It is important to remember that the normal human core temperature range measured with a rectal thermometer spans from 98.6 to 100.4 degrees Fahrenheit (37.0 to 38.0 degrees Celsius). Rectal thermometers are often colored cherry red to differentiate them from oral or axillary thermometers, as well as having a shorter, squat, pear, or stubby bulb shape. They are not meant to be used interchangeably with other types of thermometers. Rectal thermometry Rectal thermometry is taking a person's temperature by inserting a thermometer into the rectum via the anus. This is generally regarded as the most accurate means of temperature-taking,"
"Celsius The Celsius scale, also known as the centigrade scale, is a temperature scale used by the International System of Units (SI). As an SI derived unit, it is used by all countries except the United States, the Bahamas, Belize, the Cayman Islands and Liberia. It is named after the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale. The degree Celsius (°C) can refer to a specific temperature on the Celsius scale or a unit to indicate a difference between two temperatures or an uncertainty. Before being renamed to honor Anders Celsius in 1948, the unit was"
"of these averages as representing normal or ideal measurements, a wide range of temperatures has been found in healthy people. The body temperature of a healthy person varies during the day by about with lower temperatures in the morning and higher temperatures in the late afternoon and evening, as the body's needs and activities change. Other circumstances also affect the body's temperature. The core body temperature of an individual tends to have the lowest value in the second half of the sleep cycle; the lowest point, called the nadir, is one of the primary markers for circadian rhythms. The body"
"Temperature Temperature is a physical quantity expressing hot and cold. It is measured with a thermometer calibrated in one or more temperature scales. The most commonly used scales are the Celsius scale (formerly called ""centigrade"") (denoted °C), Fahrenheit scale (denoted °F), and Kelvin scale (denoted K). The kelvin (spelled with a lower-case k) is the unit of temperature in the International System of Units (abbreviated SI), in which temperature is one of the seven fundamental base quantities. The Kelvin scale is widely used in science and technology. Theoretically, the coldest a system can be is when its temperature is absolute"
"Cold and heat adaptations in humans Cold and heat adaptations in humans are a part of the broad adaptability of ""Homo sapiens"". Adaptations in humans can be physiological, genetic, or cultural, which allow people to live in a wide variety of climates. There has been a great deal of research done on developmental adjustment, acclimatization, and cultural practices, but less research on genetic adaptations to cold and heat temperatures. The human body always works to remain in homeostasis. One form of homeostasis is thermoregulation. Body temperature varies in every individual, but the average internal temperature is 37.0 °C (98.6 °F)."
"comfortable warmth is for normal, healthy adults who are appropriately dressed. For those with respiratory problems or allergies, they recommend no less than , and for the sick, disabled, very old or very young, a minimum of . Temperature ranges are defined as ""room temperature"" for certain products and processes in industry, science, and consumer goods. For instance, for the shipping and storage of pharmaceuticals, the United States Pharmacopeia-National Formulary (USP-NF) defines ""controlled room temperature"" as between , with excursions between allowed, provided the mean kinetic temperature does not exceed . The European Pharmacopoeia defines it as being simply ,"
"as Temperature scales differ in two ways: the point chosen as zero degrees, and the magnitudes of incremental units or degrees on the scale. The Celsius scale (°C) is used for common temperature measurements in most of the world. It is an empirical scale that was developed by a historical progress, which led to its zero point being defined by the freezing point of water, and additional degrees defined so that was the boiling point of water, both at sea-level atmospheric pressure. Because of the 100-degree interval, it was called a centigrade scale. Since the standardization of the kelvin in"
"until it beeps. Normal rectal temperature generally ranges from 36 to 38 °C (96.8 to 100.4 °F) and is about 0.5 °C (1 °F) above oral (mouth) temperature and about 1 °C (2 °F) above axilla (armpit) temperature. In recent years, the introduction of non-invasive temperature taking methods including tympanic (ear) and forehead thermometers, and changing attitudes on privacy and modesty have led some parents and doctors to discontinue taking rectal temperatures. By their definitions, suppositories are inserted, and enemas are injected, via the rectum. Both of these may be used for the delivery of drugs or to relieve constipation;"
"body temperature, the temperature upon waking. Basal body temperature is much less affected than daytime temperature by environmental factors such as exercise and food intake. This allows small changes in body temperature to be detected Glass oral thermometers typically have markings every 0.1 °C or 0.2 °F. Basal temperature is stable enough to require accuracy of at least 0.05 °C or 0.1 °F, so special glass basal thermometers are distinct from glass oral thermometers. Digital thermometers which have sufficient resolution (0.05 °C or 0.1 °F is sufficient) may be suitable for monitoring basal body temperatures; the specification should be checked"
"low (12 °C and below) are considered uncomfortable to many people. Thermal Neutrality (Thermal Neutral Zone) is the temperature range where it is neither comfortable or uncomfortable. The human body's metabolism is burning calories at the same rate as the temperature around. This would be around 24 °C (room temperature), and people have no opinion about the temperature. Thermal Neutrality is often also used in animal raising.For example, Farmers maintain the neutral temperature for cattle to prevent Cold Stress. Comfort Comfort (or being ""comfortable"") is a sense of physical or psychological ease, often characterized as a lack of hardship. Persons"
"is sensitive to elevated temperature in humans and some other species, and will be adversely affected by temperatures as high as normal body temperature. Consequently, the testes are located outside the body in a sack of skin called the scrotum. The optimal temperature is maintained at 2 °C (man)–8 °C (mouse) below body temperature. This is achieved by regulation of blood flow and positioning towards and away from the heat of the body by the cremasteric muscle and the dartos smooth muscle in the scrotum. Dietary deficiencies (such as vitamins B, E and A), anabolic steroids, metals (cadmium and lead),"