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The umbilical vein arises from multiple small veins within the placenta which carry oxygen and nutrient rich blood derived from the maternal blood circulation via the chorionic villi. From here, it enters the umbilical cord, along with the paired umbilical arteries.
The umbilical vein is a vein present during fetal development that carries oxygenated blood from the placenta into the growing fetus. The umbilical vein provides convenient access to the central circulation of a neonate for restoration of blood volume and for administration of glucose and drugs.
The umbilical vein is the conduit for blood returning from the placenta to the fetus until it involutes soon after birth. The umbilical vein arises from multiple tributaries within the placenta and enters the umbilical cord, along with the (usually) paired umbilical arteries. Once it enters the fetus at the umbilicus, it courses upwards towards ...
The umbilical vein carries oxygenated, nutrient-rich blood from the placenta to the fetus, and the umbilical arteries carry deoxygenated, nutrient-depleted blood from the fetus to the placenta . Any impairment in blood flow within the cord can be a catastrophic event for the fetus.
Normal umbilical cord anatomy consists of three vessels represented by two umbilical arteries and one umbilical vein. By the seventh week of gestation, the right umbilical vein usually obliterates, leaving a single (left) umbilical vein patent.
The umbilicus contains the obliterated orifices of the three umbilical vessels (one vein, two arteries). Before birth, the umbilical vein functions as the source of oxygenated blood to the fetus via the liver and ductus venosus.
Highly oxygenated, nutrient-rich blood flows from the placenta to the fetus via the umbilical vein. Approximately half of the blood in the umbilical vein bypasses the liver to flow into the ductus venosus, a fetal vessel connecting the umbilical vein to the inferior vena cava.
Oxygen and nutrients from the mother's blood are transferred across the placenta to the fetus through the umbilical cord. This enriched blood flows through the umbilical vein toward the baby’s liver. There it moves through a shunt called the ductus venosus.
The umbilical veins are the most medial veins in the caudal aspect of the embryo and conduct oxygenated blood from the chorionic villi to the sinus venosus. From: Vascular Medicine, 2006
Three symmetric paired veins form the basis of the early venous system in the 4-week embryo (6 weeks' menstrual age (MA)), draining into the heart: the umbilical veins (UVs), vitelline veins (VVs) and cardinal veins (CVs).