title: [Ultrastructure of the cellular elements in the internodal junctions of the heart conduction system in human embryonic and fetal hearts].
mesh_terms: D004622:Embryo, Mammalian / Q000648:ultrastructure*; D005318:Fetal Heart / Q000648:ultrastructure*; D005865:Gestational Age; D006329:Heart Conduction System / Q000196:embryology / Q000648:ultrastructure*; D006801:Humans; D008854:Microscopy, Electron
vernacular_title: Die Ultrastruktur von Zellelementen internodaler Verbindungen des Reizleitungssytems bei menschlichen Embryonal und Fetalherzen.