立毛肌附着于皮脂腺之下的毛囊，当它收缩时，牵拉毛囊直立，产生鸡皮疙瘩。
The arrectores pilorum are attached to the hair follicles below the sebaceous glands and, in contracting, pull the hair follicle upward, producing gooseflesh.
立毛肌附着于皮脂腺之下的毛囊，当它收缩时，牵拉毛囊直立，产生鸡皮疙瘩。
The arrectores pilorum are attached to the hair follicles below the sebaceous glands and, in contracting, pull the hair follicle upward, producing gooseflesh.
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