| Urachus | |
|---|---|
 Vertical section of bladder, penis, and urethra. Urachus is seen at top | |
 Urachus is #1 | |
| Identifiers | |
| MeSH | D014497 |
| Anatomical terminology | |
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.
- ^ Larsen, "Human Embryology," 3rd ed., pg. 258