A gradient of positional information in an insect, Rhodnius.
D000818:Animals; D002455:Cell Division; D002686:Chitin; D004058:Diffusion; D004848:Epithelium / Q000637:transplantation; D006706:Homeostasis; D007814:Larva / Q000254:growth & development; D008954:Models, Biological; D009024:Morphogenesis; D012399:Rotation; D014182:Transplantation, Autologous; D014225:Triatominae / Q000254:growth & development*
D002686:Chitin