What type of hair almost never has a medulla?

What type of hair almost never has a medulla?

• A. Terminal hair
• B. Vellus hair
• C. Cotton hair
• D. Coarse hair

Answer: (B)

Vellus hair is characterized by its fine, soft, and short nature, and it typically lacks a medulla, the innermost layer of the hair shaft. The absence of a medulla in vellus hair is a key distinguishing feature, as this type of hair is primarily found covering much of the body and provides little insulation or protection. Vellus hair plays a role in the overall function of the skin but does not have the same structure or density as terminal hair, which does contain a medulla. This structural difference is important in understanding the varying types of hair on the human body and helps in different styling or treatment approaches in cosmetology.

Vellus hair is characterized by its fine, soft, and short nature, and it typically lacks a medulla, the innermost layer of the hair shaft. The absence of a medulla in vellus hair is a key distinguishing feature, as this type of hair is primarily found covering much of the body and provides little insulation or protection. Vellus hair plays a role in the overall function of the skin but does not have the same structure or density as terminal hair, which does contain a medulla. This structural difference is important in understanding the varying types of hair on the human body and helps in different styling or treatment approaches in cosmetology.