Featured Article: How Sweat Works
Sweat is your body's way of cooling itself. Learn about eccrine and aprocrine sweat glands, how the body makes sweat, why we sweat and what factors affect sweating. See more »
skin library
The skin is the largest organ of the body, covering 18 square feet and weighing about seven pounds in an average adult. Explore the three layers of skin -- the epidermis, the dermis, and the subcutaneous layer.
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