Cat body hairs and whiskers show longitudinal gradients in cuticle thickness, melanosome-like calcium-enriched granules, and calcium-to-sulfur ratio, making hair a functionally graded composite rather than a uniform keratin fiber.
org/10.1126/science.abm2664
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Hair is a functionally graded composite, not a uniform fiber
Cat body hairs and whiskers show longitudinal gradients in cuticle thickness, melanosome-like calcium-enriched granules, and calcium-to-sulfur ratio, making hair a functionally graded composite rather than a uniform keratin fiber.