Question

why perspiration keep our body cool

Answer 1

So sweat helps cool you down two ways. First, it makes your skin feelcooler when it's wet. And when it evaporates it removes some heat. But sweat will only evaporate in an environment where there isn't much water in the air.

Answer 2

Answer:

as precipitation occurs it takes some heat to occur. so during sweating precipitation occurs by taking some heat from our body as evaporation takes place which makes our body cool