Chapter 11 Skin skin is the largest organ of the body, constitutes about 16% of body weight its total surface area is about 1.2-2.2 m2 function: protection, sensory reception, excretion and thermoregulationChapter 11 Skin ---skin is the largest organ of the body, it constitutes about 16% of body weight ---its total surface area is about 1.2-2.2 m2 ---function: protection, sensory reception, excretion and thermoregulation