| arrector | Synonym: erector. Origin: L. That which raises, fr. Ar-rigo, pp. -rectus, to raise up (05 Mar 2000) |
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| arrector pili | A microscopic band of muscle tissue which connects a hair follicle to the dermis. When stimulated, the arrector pili will contract and cause the hair to become more perpendicular to the skin surface (stand on end). (12 Dec 1998) |
| arrector pili muscles | Bundles of smooth muscle fibres, attached to the deep part of the hair follicles, passing outward alongside the sebaceous glands to the papillary layer of the corium; they act to pull the hairs erect, causing "goose bumps" or "goose flesh" (cutis anserina). Synonym: musculi arrectores pilorum, arrectores pilorum, erector muscles of hairs. (05 Mar 2000) |
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