Fetal Remnant Ligaments
Certain tubular structures from the fetal period are referred to as ligaments after they close up and turn into cord-like structures:
| Fetal | Adult |
|---|---|
| ductus arteriosus | ligamentum arteriosum |
| extra-hepatic portion of the fetal left umbilical vein | ligamentum teres hepatis (the "round ligament of the liver"). |
| intra-hepatic portion of the fetal left umbilical vein (the ductus venosus) | ligamentum venosum |
| distal portions of the fetal left and right umbilical arteries | medial umbilical ligaments |
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