Figure 3.

Electron micrograph of control pancreatic sections. (a) The acinar cells have basal, rounded, euchromatic nuclei (N), cytoplasm shows parallel cisternae of rough endoplasmic reticulum (R), mitochondria (M), and electron-dense granules (G). (b) β cells of the islets of Langerhans have euchromatic nuclei (N), and its cytoplasm is occupied by many electron-dense granules (G) encircled by clear space, mitochondria (M), rER (R), and golgi apparatus (g). (c) α cells have euchromatic nuclei (N) with prominent nucleoli (n), its cytoplasm is occupied by many electron-dense granules (G), rough endoplasmic reticulum (R), and mitochondria (M).