What is the primary characteristic of terminal hairs compared to vellus hairs?

The primary characteristic that distinguishes terminal hairs from vellus hairs is that terminal hairs are coarser and usually pigmented. Terminal hairs are typically longer, thicker, and darker than vellus hairs, which are fine, short, and usually colorless. This distinction is important for understanding hair types in various areas of the body.

Terminal hairs develop in specific regions, particularly during puberty when hormonal changes lead to the transformation of vellus hairs into terminal hairs, especially in areas such as the scalp, underarms, and pubic region. This change in texture and pigmentation plays a crucial role in identifying and classifying hair types in electrolysis practices and related fields.

Recognizing the difference in characteristics between terminal and vellus hairs is essential for professionals in the field, as it aids in making informed decisions about hair removal methods and treatments.