english: Discovered in 1869 by German pathological anatomist Paul Langerhans, the islets of Langerhans constitute approximately 1% to 2% of the mass of the pancreas.
non_english: Ditemokaké ing taun 1869 déning anatpmis kaséhatan Jerman Paul Langerhans, pulo-pulo Langerhans wujud kira-kira 1 nganti 2% saka masa pankreas.