RT Book, Section A1 Imadojemu, Sotonye A1 Seykora, John A2 Kelly, A. Paul A2 Taylor, Susan C. A2 Lim, Henry W. A2 Serrano, Ana Maria Anido SR Print(0) ID 1161544754 T1 Biology of Hair T2 Taylor and Kelly's Dermatology for Skin of Color, 2e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071805520 LK dermatology.mhmedical.com/content.aspx?aid=1161544754 RD 2024/03/29 AB KEY POINTSEmbryologic development of hair follicles is the same for all races, with the important exception of the distribution of melanin along the hair follicle of individuals of African descent.The shapes of hair follicles and the hair shaft differ based on race.The amino acid structure of hair is consistent across all racial groups.Textured hair of individuals of African descent is more susceptible to breakage (lower tensile strength) than Asian or Caucasian hair.As measured by the number of hair follicles in a 4-mm punch biopsy specimen, Asian and textured African hair is less dense than Caucasian hair.Textured African hair swells less than either Asian or Caucasian hair when in contact with water and has a decreased moisture content.