The gastroduodenal artery is derived from –
**Core Concept**
The gastroduodenal artery is a branch of the hepatic artery proper, which itself is a branch of the common hepatic artery. This artery supplies blood to the pylorus, duodenum, and pancreas. Understanding the origin of the gastroduodenal artery is crucial in surgical procedures such as cholecystectomies and in managing duodenal ulcers.
**Why the Correct Answer is Right**
The gastroduodenal artery arises from the proper hepatic artery, which is a branch of the common hepatic artery. This artery arises from the hepatic artery proper, which is a branch of the celiac trunk. The celiac trunk is the first major branch of the abdominal aorta and supplies blood to the liver, stomach, and abdominal esophagus. The gastroduodenal artery then divides into the right gastroepiploic and superior pancreaticoduodenal arteries, which supply the stomach and duodenum.
**Why Each Wrong Option is Incorrect**
**Option A:** The splenic artery is a branch of the celiac trunk but is not the origin of the gastroduodenal artery. The splenic artery supplies the spleen and stomach.
**Option B:** The left gastric artery is a branch of the celiac trunk but is not the origin of the gastroduodenal artery. The left gastric artery supplies the stomach.
**Option C:** The superior mesenteric artery is a branch of the abdominal aorta but is not the origin of the gastroduodenal artery. The superior mesenteric artery supplies the small intestine and part of the large intestine.
**Clinical Pearl / High-Yield Fact**
In surgical procedures, the gastroduodenal artery is an important landmark for identifying the pylorus and duodenum. Knowledge of its origin and branches is crucial in avoiding injury to surrounding structures.
**Correct Answer: D. The common hepatic artery.