Skin is the body's largest organ and a key part of the integumentary system, which acts as a protective barrier between the external environment and the inside of the body. Skin not only shields the internal organs against heat, light, injury and infection, but also helps regulate body temperature, prevent water loss and produce vitamin D.
Many conditions can affect the appearance, integrity or functionality of the skin. While some are relatively harmless, some diseases, such as skin cancer, can be life-threatening.
