Meckel's diveiculum is a derivative of

Meckel's diveiculum: Midgut diveiculum attaching to developing gut tube is called vitelline duct / vitello-intestinal duct. It is also known as omphalomesenteric tube (antimesenteric towards ant abdominal wall) Normally, it is content of umbilical cord & it is obliterated If it is not obliterated, it results is an anomaly called Meckel's diveiculum There is an hindgut diveiculum called allantois which is also a content of umbilical cord. If allantois is not obliterated, it results in urachal fistula (where urine comes out of umbilicus) If fecal matter / meconium is at umbilicus of baby then it is Meckel's anomaly.