In hair anatomy, the term used for the central, innermost layer is

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Multiple Choice

In hair anatomy, the term used for the central, innermost layer is

Explanation:
Medulla is the central, innermost layer of the hair shaft. It may be absent in very fine hair, but when present it sits at the center, surrounded by the cortex, which provides strength and color, and then by the cuticle, the outer protective layer. The cortex is the main body of the hair, while the cuticle protects the inner layers. So the central innermost layer is medulla.

Medulla is the central, innermost layer of the hair shaft. It may be absent in very fine hair, but when present it sits at the center, surrounded by the cortex, which provides strength and color, and then by the cuticle, the outer protective layer. The cortex is the main body of the hair, while the cuticle protects the inner layers. So the central innermost layer is medulla.

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