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The hair follicle is an organ found in mammalian skin. [ 1 ] It resides in the dermal layer of the skin and is made up of 20 different cell types, each with distinct functions. The hair follicle regulates hair growth via a complex interaction between hormones, neuropeptides, and immune cells. [ 1 ] This complex interaction induces the hair ...
Upload file; Search. Search. Appearance. ... Download as PDF; Printable version; In other projects ... The hair matrix, or simply matrix, produces the actual hair ...
Keratin is a crucial fibrous protein found in animals, constituting tough structures like hair, feathers, nails, and horns. It's classified based on tissue origin and sulfur content: soft keratins have lower sulfur, while hard keratins, found in hair and claws, contain more sulfur, creating a stronger structure. [2]
Mesenchyme is characterized morphologically by a prominent ground substance matrix containing a loose aggregate of reticular fibers and unspecialized mesenchymal stem cells. [5] Mesenchymal cells can migrate easily (in contrast to epithelial cells , which lack mobility, are organized into closely adherent sheets, and are polarized in an apical ...
Hair is a stratified squamous keratinized epithelium made of multi-layered flat cells whose rope-like filaments provide structure and strength to the hair shaft. The protein called keratin makes up hair and stimulates hair growth. Hair follows a specific growth cycle with three distinct and concurrent phases: anagen, catagen, and telogen. Each ...
In mammalian outer hair cells, the varying receptor potential is converted to active vibrations of the cell body. This mechanical response to electrical signals is termed somatic electromotility; [13] it drives variations in the cell's length, synchronized to the incoming sound signal, and provides mechanical amplification by feedback to the traveling wave.
67821. Anatomical terms of muscle. [edit on Wikidata] The arrector pili muscles, also known as hair erector muscles, [1] are small muscles attached to hair follicles in mammals. Contraction of these muscles causes the hairs to stand on end, [2] known colloquially as goose bumps (piloerection). [3]
Inner root sheath. The inner root sheath or internal root sheath of the hair follicle is located between the outer root sheath and the hair shaft. [ 1] It is made of three layers: Henle's layer, Huxley's layer, and the cuticle. [ 2]