Sweat
the name given to the perspiration or skin secretions separated from the blood by the sudoriparous glands being continually given off from the skin tion is named insensible on account of its being continually given off from the skin by evaporation; the increased secretion of sweat, dependent on exertion and which appears in the form of drops of fluid collected on the surface of the skin, tion consists of water, carbonic acid, urea, mineral matters, and sebaceous matter-the latter obtained from the glands of that name existing in the skin.
The principal salts in sweat are the chlorides of sodium and potassium, with alkaline phosphates, and sulphates.
Traces of oxide of iron also occur in the secretion. The quantity of watery vapor daily excreted by the skin under ordinary circumstances amounts to between 1½ and 2 pounds. Occasionally in some be colored by other secretions, while diseases (e. g., jaundice) the sweat may sanguineous or bloody sweat is not unknown; the cause of its production being, sanguineous or bloody sweat is not unhowever, obscure. See SKIN.