A number of fetal vessels disappear following birth; most however leave some trace in the adult (Table 3.18).
The ligamentum teres is the intra-abdominal portion of the umbilical vein. The ligamentum venosum within the liver is the remnant of the ductus venosus. The medial umbilical ligaments are the intraabdominal portions of the umbilical arteries. The proximal parts persist as the superior vesical arteries.
The limbus fossae ovalis, or annulus ovalis is the rounded fold formed from the lower edge of the septum secundum.
The ligamentum arteriosum is formed from the ductus arteriosus.
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