title: Evidence of morphogenetically significant diffusion gradients in Hydra viridis lengthened by grafting.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D004058:Diffusion; D004624:Embryo Transfer; D006829:Hydra / Q000196:embryology*; D008954:Models, Biological; D009024:Morphogenesis; D012038:Regeneration; D014184:Transplantation, Homologous