South Dakota Barbering Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

In hair care, a circular cross-section typically indicates straight hair structure. When hair is viewed in cross-section, the shape of the follicle plays a significant role in determining the hair's overall texture. A circular or round follicle allows for the hair strands to be smooth and straight. This is because the hair strands grow uniformly without any bends or curves that would interfere with the smoothness and straightness of the hair.

In contrast, other hair types tend to have different cross-sectional shapes that lead to their unique textures. For example, curly hair often has an oval or flattened cross-section, which creates its characteristic curls and waves. Wavy hair might also have a more elongated or elliptical cross-section, contributing to its texture. Coarse hair usually refers to the thickness and diameter of the individual strands rather than the shape of the cross-section itself. Thus, the identification of a circular cross-section strongly correlates with straight hair features.