63. Why do we sweat?
Sweating is an important process to cool down the body when we get
too hot.
It is produced by sweat glands on the surface of the skin. As the
sweat evaporates, the body cools down. Our body maintains a normal
temperature. When we perform some strenuous work or exercise, the
body tends to have a high body temperature. The heat goes out in
two ways. The tiny blood vessels in the skin in crease in size and let
blood fill them so that the heat travels out from the blood to the air.
This gives us a flushed appearance.
When the body becomes hotter, the sweat glands produce a mixture
of water and waste chemicals known as sweat. To evaporate, water
use a great amount of heat. So does the sweat. As it evaporates, it
takes the heat rapidly from our body.
