Go out on a hot summer day and when you back home, you would feel that your body is drenched with sweat. Possibly you will not like it. But have you ever felt a chillness on your body when you sweat? If at all, why sweat is produced during a warm day?

Sweating is one of the ways by which our body temperature is maintained. The sweat gets evaporated in the heat. As you know that evaporation causes cooling, we feel the chillness in our body. This way the temperature in our body is maintained.

Our body temperature should neither exceed nor fall below 36.6 degree Centigrade. So our body maintains this temperature by a number of ways. One of such is sweating.But who is doing this?

In our brain, there is an area called HYPOTHALAMUS, which senses the external temperature via the skin and once it feels that the temperature is higher than the set body temperature, it sends signals to the skin to produce swaet through the sweat glands.This is a thermostat effect in our body. The Hypothalamus regulates the body temperatur with respect to the external temperature.

Ok, for a warm day, how about a cold day or a rainy day? These days we would have a temperature lesser than our body temperature and what happens in such cases? Well, our body knows to handle that also. Instead of sweating, the hypothalamus will make the kidneys to urinate and maintain the body temperature. The water level balance in the body is used to regulate the body temparature by the hypothalamus