extraembryonic structure extraembryonic structure 胚外结构 umbilical cord BTO:0001415 BTO:0001415 CALOHA:TS-1078 CALOHA:TS-1078 EFO:0001415 EFO:0001415 EHDAA2:0000312 EHDAA2:0000312 EHDAA:158 EHDAA:158 EMAPA:26115 EMAPA:26115 EV:0100127 EV:0100127 FMA:85541 FMA:85541 GAID:517 GAID:517 MAT:0000280 MAT:0000280 MESH:A16.254.789 MESH:A16.254.789 MIAA:0000280 MIAA:0000280 NCIT:C34320 OpenCyc:Mx4rvyewDJwpEbGdrcN5Y29ycA OpenCyc:Mx4rvyewDJwpEbGdrcN5Y29ycA See notes for connecting stalk The connecting cord from the developing embryo or fetus to the placenta. During prenatal development, the umbilical cord comes from the same zygote as the fetus and (in humans) normally contains two arteries (the umbilical arteries) and one vein (the umbilical vein), buried within Wharton's jelly. The umbilical vein supplies the fetus with oxygenated, nutrient-rich blood from the placenta.property_value, external_definition the umbilical arteries return the deoxygenated, nutrient-depleted blood[WP]. The connecting cord from the developing embryo to the placenta. UBERON:0002331 UBERON:0002331 UMLS:C0041633 UMLS:C0041633 birth cord birth cord chorda umbilicalis chorda umbilicalis connecting stalk connecting stalk funiculus umbilicalis funiculus umbilicalis funiculus umbilicalis funiculus umbilicalis uberon uberon umbilical yolk stalk yolk stalk