Fig. 2.

—The thickness and epidermal BM zone topography of skin in humans and three Old World monkey species. The comparison of thickness of the epidermis (a) and dermis (b). Pa, Ca, Cp, and Hs indicate Papio anubis, Cercopithecus albogularis, Chlorocebus pygerythrus, and Homo sapiens, respectively. The numbers of individuals used for measurements are shown under each species name abbreviation. Photographs of hematoxylin–eosin stained histologic skin sections are from H. sapiens (c), P. anubis (d), C. albogularis (e), and Ch. pygerythrus (f). Scale bars are shown in each panel. ep. and d. indicate the epidermis and dermis, respectively. *P < 0.05, **P < 0.01, and ***P < 0.001, t-test with Bonferroni correction.