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What is the job of the arrector pili muscle how is this related to the phenomenon called goosebumps?
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What is the job of the arrector pili muscle how is this related to the phenomenon called goosebumps?

User Goatlinks
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The arrector pili muscle is the muscle connected to our, and all mammals, hair follicles. When it contracts it causes the hair to become erect causing a "goosebump."
User Jarrett Barnett
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