Where did the umbilical vein run in the embryo?

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The main idea is how blood travels from the placenta to the fetus through the hepatic system in the fetus. The umbilical vein brings oxygenated blood from the placenta and enters the liver at the porta hepatis. Within the liver, it runs toward the left side and communicates with the left portal vein. A portion of the blood then bypasses the liver via the ductus venosus directly into the inferior vena cava, but the crucial intrahepatic path is from the umbilicus to the left portal vein. After birth, this vein becomes the ligamentum teres hepatis, and the ductus venosus becomes the ligamentum venosum.