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Introduction To Hair
- Sep 23, 2016 -

Hair, generally writing hair refers to the hair growth on the head, hair is not an organ, does not contain nerves, blood vessels, but contain cells, hair other than makes aesthetic sense, which is to protect the mind. Soft and fluffy hair elastic, can withstand minor collisions can also help head sweat evaporation. About human hair is about 100,000, in all kinds of hair, hair length longer, especially the women's hair. Some can grow to 90~100cm, or even 150cm, but generally does not exceed 200cm.

Hair color is genetically determined, generally speaking, common are black, yellow, Brown and red, when the aging, hair usually silvered. Hair in the world, due to the different races and regions, and had black, yellow, Brown, Red-Brown, yellow, gray, green and even red. Also by hair dye their hair a variety of colors. Scientific research shows that hair color associated with different metals contained in the hair. Black hair contain equal amounts of copper, iron and melanin, when the nickel content increases, will become gray. Blonde hair with titanium, reddish-brown hair contains molybdenum, reddish-brown except for containing copper, iron, and cobalt, copper-green hair is too much. In some countries of Africa, some children's hair is red, was caused by the severe lack of protein.

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