Hair Follicle
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Details
A hair follicle is a part of the skin that grows hair by packing old cells together. Attached to the follicle is a sebaceous gland, a tiny sebum-producing gland found everywhere except on the palms, lips and soles of the feet. The thicker the density of the hair, the more the number of sebaceous glands that are found. Also attached to the follicle is a tiny bundle of muscle fiber called the arrector pili that is responsible for causing the follicle lissis to become more perpendicular to the surface of the skin, and causing the follicle to protrude slightly above the surrounding skin (piloerection). This process results in goose bumps (or goose flesh). Stem cells are located at the junction of the arrector and the follicle, and are principally responsible for the ongoing hair production during a process known as the Anagen stage. The average growth rate of healthy hair follicles on the scalp is half an inch per month. Certain species of Demodex mites live in the hair follicles of mammals (including those of humans) where they feed on sebum.
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130274641
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Sprache Englisch
- Größe H5mm x B220mm x T150mm
- Jahr 2010
- EAN 9786130274641
- Format Fachbuch
- ISBN 978-613-0-27464-1
- Titel Hair Follicle
- Untertitel Skin, Hair, Cell (biology), Sebaceous gland, Gland, Hand, Sole (foot), Density, Skeletal muscle, Erectores pilorum, Goose bumps, Stem cell, Demodex
- Gewicht 156g
- Herausgeber Alphascript Publishing
- Anzahl Seiten 92
- Genre Biologie
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