A cell that produces keratin, the tough protein found in hair, nails, and outer skin layers.
From Greek 'keras' (horn) + 'blastos' (bud, sprout), literally meaning 'horn-forming cell' since ancient observers saw keratin as horn-like material.
These cells are manufacturing centers in your skin—they work non-stop, creating the very substance that protects you and eventually becomes the hair you shed or nails you trim.
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