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The Races of Man; the actual page.
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[QUOTE]Originally posted by Mike111: [QB] They persist: but why were they called "Red Men", are there really Red People? The answer to that question requires a lesson in the original categories of Human Race colors, and in how Human Race works. Originally there was... The Black Race: as epitomized by Africans. The Red Race: as epitomized by American Indians. The Yellow Race: as epitomized by the Chinese. The White Race: as epitomized by the Dravidian Albinos of Central Asia. The list of people above, is in the order of the Melanin content of their skin. Melanin (Greek: melas, "black, dark") is a broad term for a group of natural pigments found in most organisms. Melanin is produced by the oxidation of the amino acid tyrosine, followed by polymerization. The pigment is produced in a specialized group of cells known as melanocytes. In the skin, melanogenesis occurs after exposure to UV radiation, causing the skin to visibly tan. Melanin is an effective absorber of light; the pigment is able to dissipate over 99.9% of absorbed UV radiation. Because of this property, melanin is thought to protect skin cells from UVB radiation damage, reducing the risk of cancer. Furthermore, though exposure to UV radiation is associated with increased risk of malignant melanoma, a cancer of the melanocytes, studies have shown a lower incidence for skin cancer in individuals with more concentrated melanin, i.e. darker skin tone. Types of melanin Some of the different types of melanin include eumelanin, pheomelanin and neuromelanin. Eumelanin is found in the hair, skin and dark areas around the nipples. It is particularly abundant among black populations. Eumelanin provides black and brown pigment to the hair, skin and eyes. When eumelanin is present only in small amounts, hair may be blonde. Pheomelanin is also found in the hair and skin. This type of melanin provides pink and red colors and is the main pigment found among red-haired individuals. This type of melanin is not as protective against UV- radiation induced cancer as eumelanin. Neuromelanin is a form of melanin found in different areas of the brain and loss of this melanin may cause several neurological disorders. [/QB][/QUOTE]
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