Is sweat and urine the same thing?

Answer 1

No. Neither does sweating and ecretiion through the kidneys have the same function in the body. The formation of urine in the kidneys is necessary to rid the body of toxic waste. Most of this nitrogenous waste is converted by the kidneys into a chemical called urea which is removed during urination. Other substances are also excreted, but urea makes up the bulk of the dissolved substances in urine. Sweating, however, serves a different function. Whilst some toxic waste can be lost through sweating, this is minor compared with that lost by urination. The main function of sweating is to cool the skin and hence the body as it evaporates. If you dip a finger in a liquid like nail varnish remover, that evaporates quickly, when you remove it you will feel your finger getting cold as the nail varnish remover absorbs energy from your finger to be able to evaporate. Sweat on the skin's surface does the same thing. As you sweat, it absorbs heat from the skin as it evaporates, and cools the skin. This in turn cools the blood passing through the skin, which in turn cools the body during hot weather. You can see the effect of this when you go swimming. When in the water, even on a warm day, you will feel warm. But when you get out of the water, the water on the skin's surface begins to evaporate and you usually feel colder than when in the water. Some animals, like dogs, do not sweat. Instead they have to remove excess heat from the body by panting.