TLDR Keratinized wool cells still have some organelles like lysosomes and mitochondria.
The study from 1976 investigated the presence and fate of cell organelles in keratinized cells of the Romney wool follicle. It was found that recognizable organelles, such as lysosomes, mitochondria, gap junction-bounded vesicles, and vacuolar-like organelles, persisted in both the keratinized fiber and the hardened inner root sheath. In the cortex, single membrane-bounded bodies and vesicles were detected in cytoplasmic remnants, resembling the lysosomes of the differentiating cortex. The fiber cuticle contained fewer single membrane-bounded organelles in the endocuticle compared to the cortex.
34 citations,
August 1966 in “Experimental cell research” Keratin fibrils in hair form and stop growing at specific points in the follicle.
191 citations,
November 1959 in “Annals of the New York Academy of Sciences” Hair and wool have complex microscopic structures with microfibrils and varying cystine content.
90 citations,
January 1979 in “International review of cytology” Wool follicles are complex, involving interactions between different cell types and structures.
36 citations,
August 2011 in “Journal of dermatological science” Human hair has a protective lipid layer that can be damaged by moisture and treatments, affecting hair growth and health.
8 citations,
January 1996 in “Springer eBooks” Male pattern baldness may be caused by factors like poor blood circulation, scalp tension, stress, and hormonal imbalances, but the exact causes are still unclear.
7 citations,
December 2011 in “Annals of anatomy” Involucrin helps strengthen the inner parts of human hair.
86 citations,
May 2002 in “Journal of Investigative Dermatology” A new keratin, hK6irs1, is found in all layers of the hair follicle's inner root sheath.
