Which hair shape is elliptical in cross section?

The hair shape described as elliptical in cross section is characteristic of individuals with Negroid ancestry. This hair type tends to be coarser and has a distinct curl pattern, which is often associated with an elliptical shape. When analyzing hair cross-sections, an elliptical shape affects the way light reflects off the hair, often giving it a different appearance compared to other hair types.

Caucasian hair typically presents a round cross section, leading to straight or wavy hair textures. Asian hair, while often straight and smooth, also has a round cross section. African hair, which can also be coarse and tightly curled, may exhibit varying shapes, but it is commonly described as oval rather than elliptical. This distinction in hair shape is fundamental in the study of hair types and assists professionals in selecting appropriate hair care and styling techniques.