umbilikalarterien
Umbilical arteries are blood vessels that carry deoxygenated blood from the fetus to the placenta during fetal development. Typically, there are two umbilical arteries within the umbilical cord. These arteries originate from the internal iliac arteries of the fetus and travel through the umbilical cord to connect with the chorionic plate of the placenta. In the placenta, the deoxygenated fetal blood exchanges waste products, such as carbon dioxide and urea, for oxygen and nutrients from the mother's blood. This exchange occurs across the placental barrier.
After the exchange, the oxygenated and nutrient-rich blood returns to the fetus via the single umbilical vein.