Question

multiple choice question
what are the three concentric regions of the hair starting from the outside and moving toward the inside?

cuticle, cortex, medulla

cortex, cuticle, medulla

cuticle, hyponychium, medulla

medulla, cortex, cuticle

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Explanation:

The outermost layer of hair is the cuticle, a protective scaly layer. Beneath it is the cortex, the thick middle layer that gives hair its structure and color. The innermost central region is the medulla. The other options either list layers in the wrong order or include non-concentric hair regions (like hyponychium, which is part of the nail structure).

Answer:

cuticle, cortex, medulla