The first segment of the small intestine receiving chyme from the stomach along with digestive enzymes from the pancreas and bile from the liver and gallbladder.
Receives acidic chyme from the stomach and neutralizes it with pancreatic secretions and bile to continue chemical digestion.
Retroperitoneal upper abdomen, curving around the head of the pancreas from the pylorus of the stomach.
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The hepatic portal vein collects nutrient-rich blood from the digestive tract and delivers it directly to the liver for processing.
The pancreas serves both digestive and endocrine roles, supplying enzymes to the small intestine while releasing insulin and glucagon into the blood.
The esophagus passes through the muscular diaphragm, and abdominal wall muscles support the abdominal viscera.