Umbilical artery

The umbilical artery (latin: arteria umbilicalis) is a branch of the anterior division of the internal iliac artery that functions only in the time of the placental blood circulation.

The umbilical artery passes along the anterior wall of the abdominal cavity to the umbilical ring, it passes further in the umbilical cord to the placenta. After birth the umbilical artery obliterates and its distal part becomes the medial umbilical ligament, but the proximal part of the umbilical artery gives rise to the superior vesical arteries.  

The umbilical arteries supply deoxygenated blood from the fetus to the placenta. After birth, the superior vesical arteries from the umbilical artery supply the urinary bladder.