The sweat on the body during the heat cools the body. Why?

The sweat that comes out in the heat on the body begins to evaporate intensively from the surface of the body. Sweat (water) molecules begin to detach and leave the surface of the human body, water evaporates from the human surface. For evaporation, you need to spend a certain amount of heat, this heat is given by the human body. Evaporation of sweat molecules take away part of the internal energy of the human body, the body temperature decreases.