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There is a correlation with skin cancer and the amount of melanin in the skin. The more melanin that you have, the less chances you are to get skin cancer. The less melanin you have, gives you a chance of possibly receiving skin cancer.
Source: Mrs.Podkomorski

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Melanin is activated more in people who live closet to the equator, as sun rays are the strongest at those regions. While, those who live furthest from the equator don't produce that much melanin.
Source: EDpuzzle Video
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Melanocytes are located at the Stratum Basale, which is in the epidermis. Their overall function is to synthesize melanin.
Source: Podko's Notes
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Vitamin D is synthesized through the skin from 7-dehydrocholesterol upon exposure to ultraviolet radiation. (Sunlight) Closer to the equator=Hotter (more sun) and closer to the poles=Colder (Less sun)
Source:EdPuzzle Video
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There is a correlation with vitamin D and amount of melanin in skin. Melanin protects us from the suns ultraviolet rays. The concentration of melanin allows people to collect what is available to manufacture vitamin D.
Source: EDpuzzle

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The epidermis has 5 layers (superficial to deep):
*Stratum Corneum- Dead skin, and called Horny layers.
*Stratum Lucidum- Invisible under microscope, thicker layers, only in palms and heels of foot.
*Stratum Granulosum- The grainy-looking part of the epidermis.
*Stratum Spinosum- Biggest layer, and location of keratinocytes.
*Stratum Basale- Birth of new skin cells and location of melanocytes.
Source: Podko's Notes
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Vitamin D has benefits that are important such as: Regulation of calcium and phosphorus absorption, maintenance of healthy bones and teeth. Symptoms of bone pain and muscle weakness can mean you have a vitamin D deficiency. That's why it is important to go outside and sweat a little!
Source:Internet
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