脐静脉

umbilical vein umbilical stalk umbilical cord umbilical cicatrice umbilical vessel umbilical shoulder umbilical lobe umbilical hernia cut the umbilical cord umbilical plug access Fetal umbilical vein umbilical vein catheterization umbilical vein graft umbilical vein perfusion umbilical vein approach sulcus of umbilical vein Catheterization of umbilical vein humam umbilical vein graft left umbilical vein Umbilical portion of portal vein Single artery and vein of umbilical cord