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We have body hair because these are our secondary sexual characteristics. This due to the action of hormones in our adolescent stage. These changes are common in both boys and girls.This change takes very slowly overs periods of months and years.A
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The outermost layer ,epidermis has hair which prevent our skin from invasion of harmful germs,dust particles, which may invade into our body and cause infection.And thus the hair follicle protects our body.
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