title: Region-specific cell activities in amphibian gastrulation.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D005775:Gastrula / Q000502:physiology*; D009024:Morphogenesis; D009866:Oogenesis; D010063:Ovum / Q000254:growth & development; D011898:Ranidae; D014982:Xenopus laevis / Q000196:embryology*