How animals 'sweat' to release extra heat

Sammy Njoroge using hose to cool down the horses during the Fawcus cup and the Moi Trophy at Manyatta Polo club in Gilgil Nakuru. [Kipsang Joseph, Standard]

If your memory is still serving you right you will remember that in biology, we studied temperature - the hotness or coldness of a body. We further studied animals and grouped them into broad two categories namely cold and warm-blooded animals. Warm-blooded animals - Homeotherms are animals most of them mammals that maintain a constant internal body temperature while the opposite was Poikilotherms - whose temperature varies according to the surrounding.