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Skin Facts The skin is the largest organ of your body, making up approx. 16% of your body weight. If you are an adult, you have about 21 square feet of skin (2 sq m) weighting approx. 7 lbs (3.2 kg). On average, the skin weighs twice as much as the brain. This fascinating organ serves a variety of functions -- it is a barrier to protect internal organs, a temperature regulator, a detector of touch, vibration, pain, temperature, an immune organ to detect infections, etc.
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