Anatomy & SciencesQuestion 12 of 484
The outermost layer of the hair shaft, composed of overlapping scales, is the:
a.Medulla
b.Cortex
c.Cuticle
d.Papilla
Explanation
The cuticle is the outermost layer of the hair; its overlapping scales protect the cortex and must be opened for chemical services.
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- Which gland in the dermis produces sebum (oil)?
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- Which structure at the base of the hair follicle supplies nutrients via blood vessels?
- Which phase of the hair growth cycle is the active growth phase?
- About how long does the catagen (transition) phase typically last?
- Which phase is the resting/shedding phase of hair?
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