Why do some hairs on your body grow differently? For example, the hair on your head and face can keep growing but your eye brows will stop at a certain point, if you were to shave it. Also, why are pubes coarse?
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all cells are differentiated from the same genetic information. Your hair follicles are differentiated in the same way that your eyeballs are different from skin cells. Same genetic information, different expression.
As to why public hair is coarse, I beleive its because it reduces friction better and is more resilient to tangling. Pretty important to avoid infections and injuries.
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