title: Proceedings: Counter-current flow of maternal and foetal blood-streams in guinea-pig placenta.
mesh_terms: D000818:Animals; D001163:Arteriovenous Anastomosis; D001783:Blood Flow Velocity; D001794:Blood Pressure; D005260:Female; D006168:Guinea Pigs; D008431:Maternal-Fetal Exchange; D010920:Placenta / Q000098:blood supply*; D011247:Pregnancy; D014316:Tritium; D014469:Umbilical Arteries; D014471:Umbilical Veins; D014599:Uterus / Q000098:blood supply
chemical_list: D014316:Tritium