title: The development of the conduction system in the mouse embryo heart. I. The first embryonic A-V conduction pathway.
mesh_terms: D000818:Animals; D005865:Gestational Age; D006325:Heart Atria / Q000196:embryology; D006329:Heart Conduction System / Q000166:cytology / Q000196:embryology* / Q000648:ultrastructure; D006352:Heart Ventricles / Q000196:embryology; D051379:Mice; D008854:Microscopy, Electron; D014617:Vacuoles / Q000648:ultrastructure