Figure 1: Nigella seed oil extract effect on pancreatic histopathology in normal and STZ-induced diabetic rats. (a and b) Control- and NSO- (2 mL/kg) treated control groups: normal control rat displayed healthy islets of Langerhans. (c) Diabetic control: arrow displays the atrophied islets of Langerhans. (d) NSO- (2 mL/kg) treated diabetic rats display bigger islets of Langerhans than do diabetic untreated group (arrowhead). Scale bar represents 50 μm.