The Anatomy of Skin

Facts about the skin:

The skin is the body's largest organ, covering the entire body. In addition to serving as a protective shield against heat, light, injury, and infection, the skin also:

• regulates body temperature
• stores water and fat
• is a sensory organ
• prevents water loss
• prevents entry of bacteria

Throughout the body, the skin's characteristics (thickness, color, texture) vary. For instance, the head contains more hair follicles than anywhere else, while the soles of the feet contain none. In addition, the soles of the feet and the palms of the hands are much thicker. The skin is made up of the following layers, with each layer performing specific functions:

• epidermis
• dermis
• subcutaneous fat layer