title: The structure of the anuran amphibian Notochord and a re-evaluation of its presumed role in early embryogenesis.
mesh_terms: D000557:Ambystoma; D000663:Amphibians / Q000196:embryology*; D000818:Animals; D004625:Embryo, Nonmammalian / Q000502:physiology*; D005260:Female; D005775:Gastrula / Q000502:physiology*; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D009672:Notochord / Q000502:physiology* / Q000648:ultrastructure; D014981:Xenopus