What is the portion of the hair located below the surface of the epidermis?

What is the portion of the hair located below the surface of the epidermis?

• A. Hair root
• B. Hair shaft
• C. Hair bulb
• D. Hair papilla

Answer: (A)

Think of hair anatomy in terms of where it sits relative to the skin. The portion that stays under the surface is the hair root, which sits inside the hair follicle in the dermis. The part you can see above the skin is the hair shaft. Deepest within the root is the hair bulb, which contains the papilla that supplies nutrients to the growing hair. So, when the question asks for the portion located below the surface of the epidermis, the hair root is the correct term. The shaft is the visible portion, while the bulb and papilla are features of the root with specific roles in growth and nourishment.

Think of hair anatomy in terms of where it sits relative to the skin. The portion that stays under the surface is the hair root, which sits inside the hair follicle in the dermis. The part you can see above the skin is the hair shaft. Deepest within the root is the hair bulb, which contains the papilla that supplies nutrients to the growing hair. So, when the question asks for the portion located below the surface of the epidermis, the hair root is the correct term. The shaft is the visible portion, while the bulb and papilla are features of the root with specific roles in growth and nourishment.