Human lips are densely packed with sensory neurons - more than in most regions of the body - but the tongue, nose and cheeks also come into play.

人的嘴唇上分布着密密麻麻的感觉神经元，比身体上大多数部位都多，不过舌头、鼻子、脸颊也会起到一定作用。

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Human lips are densely packed with sensory neurons - more than in most regions of the body - but the tongue, nose and cheeks also come into play.

人的嘴唇上分布着密密麻麻的感觉神经元，比身体上大多数部位都多，不过舌头、鼻子、脸颊也会起到一定作用。

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