Which of the following is NOT a foregut derivative?

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Multiple Choice

Which of the following is NOT a foregut derivative?

Explanation:
The main idea is how the gut tube is regionalized in development. Structures from the foregut include the esophagus, stomach, liver, biliary system, pancreas, and the proximal part of the duodenum. The liver, pancreas, and gallbladder are classic foregut derivatives. The small intestine, on the other hand, mainly comes from the midgut (jejunum and ileum, with only the very proximal duodenum arising from the foregut). Since the majority of the small intestine is midgut-derived, it is not a foregut derivative.

The main idea is how the gut tube is regionalized in development. Structures from the foregut include the esophagus, stomach, liver, biliary system, pancreas, and the proximal part of the duodenum. The liver, pancreas, and gallbladder are classic foregut derivatives. The small intestine, on the other hand, mainly comes from the midgut (jejunum and ileum, with only the very proximal duodenum arising from the foregut). Since the majority of the small intestine is midgut-derived, it is not a foregut derivative.

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