Hair has three layers: the cuticle, cortex, and medulla.
Here's a breakdown of each layer:
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Cuticle: This is the outermost layer of the hair shaft. It's made up of overlapping cells, similar to scales on a fish or shingles on a roof. According to the reference, these cells are arranged in a shingle or scale-like pattern.
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Cortex: The cortex is the middle layer and the thickest part of the hair shaft. It contains the pigment that gives hair its color.
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Medulla: The medulla is the innermost layer of the hair shaft. It's not always present, especially in fine or very blonde hair.
| Hair Layer | Description |
|---|---|
| Cuticle | Outermost layer, overlapping cells like scales. Protects the inner layers. |
| Cortex | Middle and thickest layer, contains pigment (melanin) for hair color. |
| Medulla | Innermost layer, not always present, especially in fine hair. |
