Which of the following represents the embryological origin of Meckel’s diveiculum?
**Core Concept**
Meckel's diverticulum is a congenital anomaly of the small intestine, representing a remnant of the yolk sac that fails to atrophy after embryonic development. It is a true diverticulum, containing all layers of the intestinal wall.
**Why the Correct Answer is Right**
Meckel's diverticulum arises from the vitelline duct, which is a remnant of the connection between the yolk sac and the embryonic midgut. As the embryo develops, the vitelline duct normally obliterates, but in some cases, it persists, leading to the formation of a Meckel's diverticulum. This anomaly is often found on the antimesenteric border of the ileum, which is the region where the vitelline duct typically attaches.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not specific to Meckel's diverticulum and does not accurately describe its embryological origin.
* **Option B:** Omphalomesenteric duct is another term for the vitelline duct, but it is not the correct answer as it is the duct itself, not the structure formed from it.
* **Option D:** This option is not a recognized term related to the embryological origin of Meckel's diverticulum.
**Clinical Pearl / High-Yield Fact**
Meckel's diverticulum is often associated with gastrointestinal bleeding, especially in children, due to the presence of ectopic gastric or pancreatic tissue within the diverticulum.
**Correct Answer:** C. Vitelline duct.