Hair is made from a protein known as keratin. The hair shaft is made up of three layers, known as the cuticle, the cortex and the medulla.
http://www.hairtransplants-hdc.com/lang-en/Useful-Facts-About-Hair/pageid-386/Hair is made from a protein known as keratin. The hair shaft is made up of three layers, known as the cuticle, the cortex and the medulla.
http://www.hairtransplants-hdc.com/lang-en/Useful-Facts-About-Hair/pageid-386/
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