例句與造句

1. The allantois regresses into the embryo to give rise to the urinary bladder and median umbilical ligament.
2. This canal is initially open, but later closes as the urachus goes on to definitively form the median umbilical ligament.
3. Proposed mechanisms for the spread of cancer cells to the umbilicus include direct transperitoneal spread, via the lymphatics which run alongside the obliterated umbilical vein, hematogenous spread, or via remnant structures such as the falciform ligament, median umbilical ligament, or a remnant of the vitelline duct.
4. It's difficult to find median umbilical ligament in a sentence. 用median umbilical ligament造句挺難的