Skin is an Organ

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Skin is a vital part of your appearance and health. It is what keeps you looking young and maintains healthy glow. Your skin's condition can also make you look tired and aged. Skin has a much more important role than just looks - it helps keeps you healthy. Since your skin is the largest organ of your body, it is also considered as one of the most important. 

Beware of the Sun

Harmful radiation in sunlight, or other sources, is absorbed by the pigmentation, or melanin, in the skin. Fair skinned people without much melanin are more prone to skin cancer than those who have more medium and dark skin tones. One form of skin cancer that is predominately produced by overexposure to the sun is malignant melanoma. Melanoma will strike about 1% of people in their lifetime and, left untreated, is frequently fatal. Sunburns (especially blistering sunburns in childhood) definitely play a role in melanoma.

Three Layers of Skin

Your skin is composed of three primary layers: the epidermis, the dermis, and the hypodermic or deep fatty layer. The epidermis, which is the outermost layer, provides waterproofing and serves as a barrier to your body from infection. 

The Dermal Layer = In The Middle

The dermis is the middle layer of skin and contains blood vessels, nerves, hair follicles, smooth muscle, glands, and lymphatic tissue. This is the layer where the UV-A light is converted into the longer wavelengths that we can see residue  etc. This process is called fluorescence. tool that uses a fluorescent black light with a magnifying mirror for analyzing the skin.