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June 2018 in “Archives of Disease in Childhood Education & Practice” The girl's hair started regrowing after 6 weeks of treatment.
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February 2025 in “Journal of Investigative Dermatology” Lipocartilage is a new type of tissue that affects hair growth and cartilage regeneration.
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January 1981 in “PubMed” Hair medullary cells in mammals vary in complexity, with humans having more structured cells similar to inner root sheath cells.
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November 2013 in “Biochemistry and Molecular Biology Education” Keratins are crucial proteins for hair and nails, with a structure that helps teach protein principles.
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November 2017 in “Cureus” Ear creases might indicate heart disease risk, needing more research.
March 2026 in “Dermatology Online Journal” Cystic panfolliculoma is a rare, harmless tumor that can be confused with other skin tumors.
10 citations
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November 2016 in “International Journal of Cosmetic Science” A tough membrane between the outer and inner layers of human hair protects it from damage.
November 2025 in “Journal of Investigative Dermatology” Skin-associated cartilage cells can influence hair growth by altering specific signaling pathways.
46 citations
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May 2006 in “Laser Physics” Particles similar in size to hair cells penetrate hair follicles better.
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February 1998 in “Polymer” Human hair keratin has a 40% α-helix structure that changes to a random coil in 8 M urea.
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February 2016 in “Anatomical Science International” Hair proteins change location and structure as hair cells mature.
65 citations
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May 2006 in “Journal of Structural Biology” Hair curliness is due to uneven distribution of different cortices within the hair fiber.
July 2021 in “SBV Journal of Basic Clinical and Applied Health Science” Single-layer closure is as effective as multiple-layer closure, with shorter surgery time and lower cost.
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July 2007 in “Journal of comparative neurology” Manatee whiskers are specially adapted for touch in water.
March 2023 in “Pediatrics & neonatology” A baby girl had two brain-related growths removed and is developing normally.
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October 1989 in “PubMed” Optimized conditions and specific treatments enhance the growth of hair cells from C3H mice.
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November 2007 in “Acta Veterinaria Hungarica” The ovine interdigital sinus has a complex structure with three layers and various skin-like features.
18 citations
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August 2009 in “Skin Research and Technology” OCT can identify hair structures, but chemical treatments can damage them.
February 2025 in “Proceedings of the National Academy of Sciences” Only Deomyinae rodents can regenerate complex tissues.
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January 2002 in “Zhiwu Yanjiu” Capitate trichomes have more endoplasmic reticulum and vacuoles, while peltate trichomes have more plastids and larger subcuticular spaces.
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January 2001 in “PubMed” Mechanoreceptors convert physical touch into electrical signals through specialized nerve structures.
May 2026 in “Waste and Biomass Valorization” 88 citations
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January 1981 in “British Journal of Dermatology” A new method helps grow human hair cells using a cow eye lens.
4 citations
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January 2011 in “Dermatology” A patient grew extra hair on their ears after treatment for testicular cancer, possibly due to hormonal changes or genetics.
191 citations
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November 1959 in “Annals of the New York Academy of Sciences” Hair and wool have complex microscopic structures with microfibrils and varying cystine content.
19 citations
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July 1964 in “PubMed” Hair follicle cells become four types: medulla, cortex, cuticle, and inner root sheath.
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February 2004 in “British Journal of Dermatology” Keratin in mouse hair follicles is complex and plays specific roles.
26 citations
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August 2007 in “Annals of Anatomy - Anatomischer Anzeiger” Feathers become harder as they develop due to a change in keratin type.
January 2026 in “MDPI (MDPI AG)” The hairy ear mutation in mice is linked to changes in gene expression affecting hair growth.
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January 1971 in “Acta dermato-venereologica” Mice hair follicles take in the amino acid cystine.