Dictionary of Human Evolution and Biology

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Insensible Water Loss

Nonthermal perspiration characterized by constant evaporation of water from human tissues unless relative humidity is 100%. Diffusion occurs through the pores of the skin and lungs. In humans, about 900 ml per day is lost through the skin, and 400 ml per day through the lungs. Most other species have much lower rates of water los.

See sweat.

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