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How our body maintains a constant temperature. Temperature receptors in the skin detect changes in the external temperature. They pass this information to the processing centre in the brain, called the hypothalamus. The processing centre also has temperature receptors to detect changes in the temperature of the blood.
Dehydration â to keep healthy, our body temperature needs to stay around 37Â°C. The body cools itself by sweating, which normally accounts for 70 to 80 per cent of the bodyâs heat loss. If a person becomes dehydrated, they donât sweat as much and their body temperature keeps rising.