The islets of Langerhans are the regions of the pancreas that contain its endocrine (i.e., hormone-producing) cells. Discovered in 1869 by German pathological anatomist Paul Langerhans at the age of 22, the islets of Langerhans constitute approximately 1 to 2% of the mass of the pancrea [Wikipedia: http://en.wikipedia.org/wiki/Islets_of_Langerhans].
Hierarchy: 2
Parent: endocrine pancreas
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