title: Development of the conduction system of human embryonic and fetal heart: differentiation of internodal connection.
mesh_terms: D002454:Cell Differentiation; D004622:Embryo, Mammalian / Q000166:cytology* / Q000201:enzymology; D005260:Female; D005318:Fetal Heart / Q000166:cytology* / Q000201:enzymology; D005865:Gestational Age; D006329:Heart Conduction System / Q000166:cytology / Q000196:embryology* / Q000201:enzymology; D006651:Histocytochemistry; D006801:Humans; D007395:Interneurons / Q000648:ultrastructure; D011247:Pregnancy