One of the largest organs of the body is the skin. While most believe that skin is there to keep off dust and dirt but it has many other crucial purposes. The upper skin layer called the epidermis, aids in Vitamin D synthesis, sensory (touch) detection, and creates the skin tone. The lower skin called the dermis has connective tissue, blood vessels, oil and sweat glands, nerves, hair follicles, and other structures that work as a barrier for p...