The superior vesical aeries are direct branches of the

The umbilical aery is a branch of the internal iliac aery. In the fetus, the umbilical aery passes over the bladder and continues up the anterior body wall to the umbilical cord and out to the placenta. As it passes the bladder, it gives rise to the superior vesical aeries. After bih, the pa of the aery distal to the bladder becomes fibrous, but the proximal pa remains patent and continues to supply the bladder.