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From Wikipedia:
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A woman is an adult female human being. The term woman (irregular plural: women) usually is used for an adult, with the term girl being the usual term for a female child or adolescent. However, the term woman is also sometimes used to identify a female human, regardless of age, as in phrases such as "Women's rights". |
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Hair is a keratinised protein filament that grows through the epidermis from follicles deep within the dermis. Found exclusively in mammals, it is one of the of the defining characteristic of the mammalian class. Although many other organisms, especially insects, show filamentous outgrowths, these are not considered "hair" in the scientific sense. So-called "hairs" (trichomes) are also found on plants. The projections on arthropods such as insects and spiders are actually insect bristles, composed of a polysaccharide called chitin. The hair of non-human mammal species is commonly referred to as fur. There are varieties of cats, dogs, and mice bred to have little or no visible fur. In some species, hair is absent at certain stages of life. The main component of hair fiber is keratin. Keratins are proteins: long chains (polymers) of amino acids.
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Men vs Women, 
