
High resolution image: The duodenal bulb seen through the pylorus

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The first part of the duodenum is called the duodenal bulb, bulbus duodeni.

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The duodenal bulb is the first part of the duodenum. It begins at the pylorus and is about 5 centimeters long. The distal part of the bulb is located retroperitoneally.

High resolution image: Duodenal bulb
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