title: Placental transfer of oxygen and carbon dioxide.
mesh_terms: D002245:Carbon Dioxide / Q000097:blood*; D005260:Female; D005333:Fetus / Q000502:physiology*; D006801:Humans; D008431:Maternal-Fetal Exchange; D008962:Models, Theoretical; D010100:Oxygen / Q000097:blood*; D010920:Placenta / Q000502:physiology*; D011247:Pregnancy
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen