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Question
How does perspiration or sweating help keep our body cool on a hot day ?
Solution
High temperature in the surroundings rises our body temperature. This rise in the body temperature is accompanied with secretion of sweat from the sweat glands. This sweat absorbs the body heat to achieve its latent heat of vaporization and evaporates. In the process, body temperature decreases due to release of body heat to sweat.
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