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Chapter 7
Cos Chapter 7 Hair and Scalp Diseases
| Term | Definition |
|---|---|
| trichology | the scientific study of the hair and scalp |
| hair root | the portion of the hair strand located beneath the skin's surface, extending into the deeper layers of the dermis |
| hair shaft | the visible, non-living portion of the hair that extends above the surface of the skin |
| hair follicle | a complex, tube-like organ located in the dermis and epidermis that produces and anchors a hair strand |
| hair bulb | the enlarged, bulb-like structure at the deepest part of the hair root |
| dermal papilla | a specialized cluster of mesenchymal cells located at the very base of the hair follicle |
| hair cuticle | the outermost protective layer of the hair shaft |