Arrector Pili are tiny muscles attached to the base of the hair follicles.
竖肌(立肌)是一些附底部的细小的肌肉。
Arrector Pili are tiny muscles attached to the base of the hair follicles.
竖肌(立肌)是一些附底部的细小的肌肉。
Arrector Pil : Each hair follicle has a tiny muscle called the arrector pili attached to it.
立肌:每一个发下面连一个很小的肌肉叫做立肌。
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