part of part_of part of continuous with continuous with develops_from develops from develops from Eumetazoa multi-tissue structure urinary bladder urachus http://upload.wikimedia.org/wikipedia/commons/6/63/Gray1156.png MA:0001701 EHDAA:7016 EHDAA:9332 UMLS:C0041916 Wikipedia:Urachus GAID:1313 EMAPA:18323 RETIRED_EHDAA2:0002138 EHDAA2:0002137 SCTID:276858000 MESH:D014497 A fibrous remnant of the allantoic stalk, a narrow fetal canal connecting the apex of the urinary bladder with the umbilicus located in the space of Retzius, between the transversalis fascia anteriorly and the peritoneum posteriorly. its lumen is normally obliterated during development, transforming the urachus into a solid cord, a functionless remnant that persists throughout life as the median umbilical ligament; failure of complete lumen obliteration may result in distinct congenital urachal remnant anomalies[MP]. NCIT:C12338 urachal FMA:70343 UBERON:0002068 A fetal canal connecting the bladder with the allantois, persisting throughout life as a cord (median umbilical ligament). [TFD][VHOG] VHOG:0000735 allantois umbilicus