title: Studies on the obliteration of the ductus arteriosus in rat embryos.
mesh_terms: D000818:Animals; D001835:Body Weight; D004373:Ductus Arteriosus / Q000196:embryology / Q000502:physiology*; D004622:Embryo, Mammalian / Q000033:anatomy & histology; D051381:Rats; D012119:Respiration; D013997:Time Factors