Light micrograph of a section of the pancreas showing the Islet of Langerhans containing cells which secrete the hormones insulin, glucagon and somatostatin. The first two hormones play an important role in the metabolism of carbohydrates. The Islet of Langerhans is surrounded by a capsule. The dark stained ovals within are the alpha, beta & delta hormone secreting cells, which secrete glucagon, insulin & somatostatin respectively. Magnification: X 250 (at 6x6 size) X108 (at 35mm size).