title: Interactions in the skin.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo; D002856:Chromatophores; D005246:Feedback; D006168:Guinea Pigs; D006197:Hair / Q000033:anatomy & histology; D006801:Humans; D010858:Pigmentation; D012867:Skin / Q000033:anatomy & histology / Q000196:embryology / Q000254:growth & development; D012879:Skin Physiological Phenomena; D016038:Skin Transplantation; D014182:Transplantation, Autologous