Human beings living in other countries have more sweat pore on their skin as compared to those in colder countries."explain
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Answer:
Humans and many other mammals have unusually efficient internal temperature regulating systems that automatically maintain stable core body temperatures in cold winters and warm summers. In addition, people have developed cultural patterns and technologies that help them adjust to extremes of temperature and humidity.
In very cold climates, there is a constant danger of developing hypothermia click this icon to hear the preceding term pronounced, which is a life threatening drop in core body temperature to subnormal levels. The normal temperature for humans is about 98.6° F. (37.0° C.). However, individual differences in metabolism click this icon to hear the preceding term pronounced, hormone levels, physical activity, and even the time of day can cause it to be as much as 1° F. (.6° C.) higher or lower in healthy individuals. It is also normal for core body temperature to be lower in elderly people. Hypothermia begins to occur when the core body temperature drops to 94° F. (34.4° C.). Below 85° F. (29.4°C.), the body cools more rapidly because its natural temperature regulating system (in the hypothalamus click this icon to hear the preceding term pronounced) usually fails. The now rapid decline in core body temperature is likely to result in death. However, there have been rare cases in which people have been revived after their temperatures had dropped to 57-60° F. (13.9-15.6° C.). This happened in 1999 to a Swedish woman who was trapped under an ice sheet in freezing water for 80 minutes. She was found unconscious, not breathing, and her heart had stopped beating, yet she was eventually revived despite the fact that her temperature had dropped to 56.7° F. (13.7° C.).
In extremely hot climates or as a result of uncontrollable infections, core body temperatures can rise to equally fatal levels. This is hyperthermia click this icon to hear the preceding term pronounced. Life threatening hyperthermia typically starts in humans when their temperatures rise to 105-107° F. (40.6-41.7° C.). Only a few days at this extraordinarily high temperature level is likely to result in the deterioration of internal organs and death.
Body size and shape are significant factors in how efficiently an individual responds physiologically to cold and hot climates. Two 19th century naturalists, Carl Bergmann and Joel Allen, formulated rules concerning these factors.