11338 IUPAC Gold Book - umbilical artery 10.1351/goldbook.11338 11338 current 1 Paired artery that, in the fetus, returns deoxygenated blood from each half of the fetal body to the placenta, via the umbilical cord. In the adult, part of the umbilical artery remains open as a branch of the internal iliac artery, and part ceases to be an artery and becomes the medial umbilical ligament. adult https://goldbook.iupac.org//terms/view/10347 fetus https://goldbook.iupac.org//terms/view/10718 iliac artery https://goldbook.iupac.org//terms/view/10839 placenta https://goldbook.iupac.org//terms/view/11095 umbilical cord https://goldbook.iupac.org//terms/view/11339 PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 817 (https://doi.org/10.1515/pac-2015-1202) https://goldbook.iupac.org/terms/view/11338/html https://goldbook.iupac.org/terms/view/11338/json https://goldbook.iupac.org/terms/view/11338/plain Citation: 'umbilical artery' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.11338 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-07-15T00:08:21+00:00