Which part of the small intestine is described as U-shaped and receives secretions via the bile duct?

• A. Cecum
• B. Duodenum
• C. Jejunum
• D. Ileum

Answer: (B)

The duodenum is the part described as U-shaped and is where bile and pancreatic secretions first mix with chyme. It forms a curved, near-360-degree arc around the head of the pancreas, creating a familiar U/C shape. The common bile duct brings bile to the duodenum, entering together with pancreatic juice via the major duodenal papilla. This makes the duodenum the primary transition zone where digestive fluids from the liver and pancreas combine with stomach contents before moving further along the small intestine.

The other options aren’t correct because the cecum is part of the large intestine and doesn’t receive biliary secretions, while the jejunum and ileum are subsequent sections of the small intestine that do not directly receive bile via the bile duct.