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L&SS-IS

By Catherine Davis | 5.30.17
​Commentator, Chief Editor, L&SS

Listen & Study Service Commentary:

This story seems to strange to be true. Fingernails grew out of the skin on her face and scalp. That's exactly what I envisioned before I took a closer look at her face while watching the video. I knew that nails are dead tissue, but that was all. At that thought, I instantly felt an overwhelming heartache and pity for her. It reminded me of the man who had tree bark like skin all over his body. (see video below)

This condition defined:

​Keratin
Keratin (/ˈkɛrətɪn/) is one of a family of fibrous structural proteins known as scleroproteins. α-Keratin is a type of keratin found in vertebrates. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, calluses, and the outer layer of skin among vertebrates. Keratin also protects epithelial cells from damage or stress. Keratin is extremely insoluble in water and organic solvents. Keratin monomers assemble into bundles to form intermediate filaments, which are tough and form strong unmineralized epidermal appendages found in reptiles, birds, amphibians, and mammals. Excessive keratinization participate in fortification of certain tissues such as in horns of cattle and rhinos, and armadillos' osteoderm. The only other biological matter known to approximate the toughness of keratinized tissue is chitin. Keratin comes in two types, the primitive, softer forms found in all vertebrates and harder, derived forms found only among sauropsids (reptiles and birds). Keratin resists digestion, which is why cats regurgitate hairballs.

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  Wikipedia

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