Urachus

The urachus is a remnant of the allantois, which usually disappears completely during embryonic development. In adults, the urachus, as a rule, has the appearance of a fibrous cord connecting the bladder to the navel. In some cases, an abnormal urachus in the form of an open duct may be observed.

The term "urachal" refers to the urinary duct (urachal). The urachus is an embryonic structure derived from the allantois that connects the bladder to the yolk sac. After birth, the urachus usually becomes obliterated and becomes a fibrous cord between the bladder and the umbilicus. However, in rare cases, the urachus may remain partially open, resulting in urachal fistulas or cysts.

Urachus is a remnant of the allantois, which usually completely disappears during embryonic development. In adults, the urachus is usually a fibrous cord connecting the bladder to the umbilicus; Sometimes an abnormal urachus in the form of an open duct may be observed. Urachus refers to the urinary duct (urachal).