Question

why thus we perstire on a hot day

Answer 1

As soon as the temperature rises, the sweat glands are stimulated to secrete perspiration. It is the nature’s way to keep the body cool. During the process of evaporation of sweat, it takes away the body heat, thus making us feel cool.

Answer 2

As soon as the temperature rises, the sweat glands are stimulated to secrete perspiration. It is the nature's way to keep the body cool. During the process of evaporation of sweat, it takes away the body heat, thus making us feel cool.