title: [Ultrastructure of cellular elements of internodal connections in the conduction system of human embryonic and fetal hearts].
mesh_terms: D005260:Female; D006329:Heart Conduction System / Q000196:embryology* / Q000648:ultrastructure; D006801:Humans; D011247:Pregnancy
vernacular_title: Die Ultrastruktur von Zellelementen internodaler Verbindungen des Reizleitungssytems bei menschlichen Embryonal und Fetalherzen.