Which hair layer is the outer protective layer?

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Multiple Choice

Which hair layer is the outer protective layer?

Explanation:
The outer protective layer is the cuticle. It’s made of flat, scale-like cells that overlap like shingles, forming a tough shield around the inner structures and helping lock in moisture while protecting the hair from damage. Beneath the cuticle lies the cortex, which provides strength, elasticity, and color, and the medulla, the sometimes-present central core. The hair shaft is the visible strand itself, not a specific layer. When the cuticle stays smooth and intact, hair looks shiny, feels smooth, and resists damage.

The outer protective layer is the cuticle. It’s made of flat, scale-like cells that overlap like shingles, forming a tough shield around the inner structures and helping lock in moisture while protecting the hair from damage. Beneath the cuticle lies the cortex, which provides strength, elasticity, and color, and the medulla, the sometimes-present central core. The hair shaft is the visible strand itself, not a specific layer. When the cuticle stays smooth and intact, hair looks shiny, feels smooth, and resists damage.

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