title: INTRAUTERINE RESPIRATION IN THE RAT FETUS. II. ANALYSIS OF ROENTGENOLOGICAL TECHNIQUES.
mesh_terms: D000650:Amnion; D000818:Animals; D001158:Arteries; D003287:Contrast Media; D005260:Female; D005333:Fetus; D006168:Guinea Pigs; D006801:Humans; D000860:Hypoxia; D007468:Iodopyracet; D008168:Lung; D051381:Rats; D012106:Research; D012119:Respiration; D013911:Thorium Dioxide; D014599:Uterus
chemical_list: D003287:Contrast Media; D013911:Thorium Dioxide; D007468:Iodopyracet
keywords: AMNION; ANOXIA; ARTERIES; CONTRAST MEDIA; EXPERIMENTAL LAB STUDY; FETUS; GUINEA PIGS; IODOPYRACET; LUNG; RATS; RESPIRATION; THORIUM DIOXIDE; UTERUS