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Outer root sheath information


The outer root sheath or external root sheath of the hair follicle encloses the inner root sheath and hair shaft.[1] It is continuous with the basal layer of the interfollicular epidermis (skin).

  1. ^ James, William; Berger, Timothy; Elston, Dirk (2005) Andrews' Diseases of the Skin: Clinical Dermatology (10th ed.). Saunders. Page 8. ISBN 0-7216-2921-0.

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Outer root sheath

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The outer root sheath or external root sheath of the hair follicle encloses the inner root sheath and hair shaft. It is continuous with the basal layer...

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Root sheath

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developing tooth Root sheath (hair), at the base of a hair follicle Inner root sheath Outer root sheath Seed root sheath, root sheaths in the seeds of...

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Inner root sheath

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The inner root sheath or internal root sheath of the hair follicle is located between the outer root sheath and the hair shaft. It is made of three layers:...

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Trichilemmoma

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cutaneous neoplasm that shows differentiation toward cells of the outer root sheath.: 673  The lesion is often seen in the face and neck region. Multifocal...

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Epithelial root sheath

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The Hertwig epithelial root sheath (HERS) or epithelial root sheath is a proliferation of epithelial cells located at the cervical loop of the enamel organ...

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Sheath

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well as long guns, such as rifles and shotguns. The outer covering of an electrical cable Debye sheath, a layer of a plasma in physics Heliosheath, the region...

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Hair follicle

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the outermost layer of the hair fiber. The bulge is located in the outer root sheath at the insertion point of the arrector pili muscle. It houses several...

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Alopecia X

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which are spikes of fused keratin that seem to protrude through the outer root sheath to the vitreous layer that creates a type of 'fiery' effect — appear...

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Trichilemmal cyst

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the outer root sheath of the hair follicle. Their origin is currently unknown, but they may be produced by budding from the external root sheath as a...

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Leg hair

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scientists have experimented on. The hair follicles are localized to the outer root sheath during one of the phases of the hair growth cycle. Such experiments...

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Loose anagen syndrome

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of outer root sheath of an loose anagen hair would display malformations and weak linkage in the cells within the epithelium of the outer root sheath. This...

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Melanocyte

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melanoblast. In adults, stem cells are contained in the bulge area of the outer root sheath of hair follicles. When a hair is lost and the hair follicle regenerates...

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Hair matrix

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simply matrix, produces the actual hair shaft as well as the inner and outer root sheaths of hair. James, William; Berger, Timothy; Elston, Dirk (2005) Andrews'...

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Pseudofolliculitis barbae

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structurally weakens the companion layer separating the inner and outer root sheath and increases the chances that a beard hair will in-grow. The most...

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Pili torti

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Uneven growth of the outer root sheath cells is the source of hair twisting in hereditary forms. The hair shaft and inner root sheath are unevenly molded...

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Root

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apoplastic barrier (present at the outer cell layers of roots) which prevents toxic compounds from entering the root and reduces radial oxygen loss (ROL)...

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Thecal sac

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along their paths out of the vertebral canal which become the dural root sheaths. The lumbar cistern is part of the subarachnoid space. It is the space...

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DKK1

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vitro. Neutralizing antibody against DKK-1 reversed DHT effects on outer root sheath keratinocytes. DKK-1 expression is attenuated by L-threonate in vitro...

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List of distinct cell types in the adult human body

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Trichocyte Huxley's layer hair root sheath cell Trichocyte Henle's layer hair root sheath cell Trichocyte Outer root sheath hair cell Trichocyte Surface...

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Skin secretions

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distributed over the skin surface where it lubricates and waterproofs the outer layer of the skin, the stratum corneum. Defensins are substances that are...

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Schwann cell

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cells wrap around axons of motor and sensory neurons to form the myelin sheath. The Schwann cell promoter is present in the downstream region of the human...

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Cementoblast

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by an increase in length. Other theories involve Hertwig epithelial root sheath (HERS) being involved. Thus cementoblasts resemble bone-forming osteoblasts...

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Cementogenesis

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root sheath (HERS) must fragment. HERS is a collar of epithelial cells derived from the apical prolongation of the enamel organ. Once the root sheath...

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Seed

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botany, a seed is a plant embryo and food reserve enclosed in a protective outer covering called a seed coat (testa). More generally, the term "seed" means...

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Rhizoctonia solani

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potatoes, bare patch of cereals, root rot of sugar beet, belly rot of cucumber, banded leaf and sheath blight in maize, sheath blight of rice, and many other...

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Coleoptile

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Coleoptile is the pointed protective sheath covering the emerging shoot in monocotyledons such as grasses in which few leaf primordia and shoot apex of...

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Bone morphogenetic protein 4

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is expressed ectopically, within transgenic mice the hair follicle outer root sheath (ORS) the proliferation of the cell matrix is inhibited. BMP4 also...

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Cervical loop

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disappear and only the basal layers are left creating Hertwig's epithelial root sheath (HERS). At this point it is usually referred to as HERS instead of the...

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