The urachus is a fibrous remnant of the allantois, a canal that... - dofaq.co
urachus

The urachus is a fibrous remnant of the allantois, a canal that...

wikipedia - 15 Nov 2021
The urachus is a fibrous remnant of the allantois, a canal that drains the urinary bladder of the fetus that joins and runs within the umbilical cord.[1] The fibrous remnant lies in the space of Retzius, between the transverse fascia anteriorly and the peritoneum posteriorly.

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