Where does the ligamentum teres extend?

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The ligamentum teres is the fibrous remnant of the fetal umbilical vein. In the adult, it forms a cord within the free edge of the falciform ligament and runs from the umbilicus to the left branch of the portal vein in the porta hepatis. This explains why it extends from the navel to the left portal vein. The other options do not match the fetal-into-adult course of this structure (it does not connect to the hepatic artery or inferior vena cava).