title: The placental transfer of gases and fixed acids.
mesh_terms: D001769:Blood / Q000737:chemistry*; D001774:Blood Chemical Analysis; D005260:Female; D005740:Gases; D006801:Humans; D010920:Placenta / Q000502:physiology*; D011247:Pregnancy
chemical_list: D005740:Gases
keywords: BLOOD/chemistry; PLACENTA/physiology