What is sweat? What does it contain? State its function.
Sweat is a watery fluid secreted by the sweat glands located in the skin. Sweat contains NaCl, urea in small amount and lactic acid.
Functions of sweat:
Sweat facilitates the cooling effect on the body surface.
It helps to remove some excretory substances from the body such as lactic acid, urea etc.
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