Celiac Trunk major branches: Biochemical Pathways (Secondary Prevention Standard)

■ DEFINITION: The Celiac Trunk (celiac axis) is the primary anterior branch of the abdominal aorta that supplies the embryological Foregut. ■ ORIGIN & LEVEL: Arises from the anterior aspect of the aorta at the level of the T12 vertebra, immediately after the aorta enters the abdomen through the diaphragmatic hiatus. ■ THE THREE MAJOR BRANCHES: 1. Left Gastric Artery (smallest branch): Runs upward and left to supply the lower esophagus and the lesser curvature of the stomach. 2. Splenic Artery (largest branch): Takes a tortuous, wavy course along the superior border of the pancreas to supply the spleen, fundus of the stomach (via short gastrics), and greater curvature (via left gastro-omental). 3. Common Hepatic Artery: Runs to the right, dividing into: - Proper Hepatic Artery (supplies the liver and gallbladder). - Gastroduodenal Artery (supplies the duodenum and pancreatic head). ■ BIOCHEMICAL MECHANISMS: At the molecular level, enzyme kinetics govern reaction rates. Competitive inhibitors raise apparent Michaelis constants without changing maximum speed, whereas noncompetitive inhibitors decrease maximum speed directly. ■ SECONDARY PREVENTION METRICS: Implementing long-term dietary adaptations, physical therapy, and compliance aids reduces the rate of recurring acute crises by more than half. [HY-BOARD-1230]