Irregular microscopic structures consisting of cords of endocrine cells that are scattered throughout the PANCREAS among the exocrine acini. Each islet is surrounded by connective tissue fibers and penetrated by a network of capillaries. There are four major cell types. The most abundant beta cells (50-80%) secrete INSULIN. Alpha cells (5-20%) secrete GLUCAGON. PP cells (10-35%) secrete PANCREATIC POLYPEPTIDE. Delta cells (̃5%) secrete SOMATOSTATIN
Isley Brothers. / http://id.loc.gov/authorities/names/n91012805 : Contemporary musicians. Volume 47 : profiles of the people in music / Angela M. Pilchak, project editor
Islington (London, England) -- Guidebooks. : Walks through Islington : comprising an historical and descriptive account of that extensive and important district, both in its ancient and present state : together with some particulars of the most remarkable objects immediately adjacent / by Thomas Cromwell ; embellished with numerous engravings by J. & H.S. Storer
1835
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Islington (London, England) -- History. : The northern heights of London ; or Historical associations of Hampstead, Highgate, Muswell Hill, Hornsey, and Islington. / By William Howitt
İsmail Hakkı Paşa, 1858-1925. : The orientalist Karl Sussheim meets the young Turk officer İsma'il Hakki Bey : two unexplored sources from the last decade in the reign of the Ottoman Sultan Abdulhamid II / by Jan Schmidt
