In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Frey's procedure is used to treat inflammation of this organ, and the Whipple Procedure involves the removal of its head. Endoscopic ultrasonography is often used to detect the tumors on this organ that are caused by Zollinger-Ellison syndrome. The head of this yellowish organ contains the duct of Wirsung, which is connected to the duodenum, and its tail stretches behind the stomach. For 10 points, name this organ that is home to the islets of Langerhans and produces a namesake juice.
Science