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| underarm hair ： ウィキペディア英語版 |
underarm hair
Underarm hair, also known as axillary hair, is the hair in the underarm area (''axilla'').
== Development and function ==
Underarm hair, as human body hair, normally starts to appear at the beginning of puberty, with growth usually completed by the end of the teen-age years. The evolutionary significance of human underarm hair is still debated. It may naturally wick sweat or other moisture away from the skin, aiding ventilation. Colonization by odor-producing bacteria is thereby transferred away from the skin (see skin flora).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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