title: The "organization centre". 3. Segregation and pattern formation in morphogenetic fields.
mesh_terms: D002454:Cell Differentiation; D004475:Ectoderm; D004626:Embryology; D004707:Endoderm; D007668:Kidney / Q000196:embryology; D008648:Mesoderm; D009420:Nervous System / Q000196:embryology