The document discusses the pancreas and its role in regulating blood glucose levels through the hormones insulin, glucagon, and somatostatin. It describes how insulin promotes glucose and fat storage while glucagon has the opposite effect of raising blood glucose. Diabetes results from insufficient insulin or insensitivity to its effects and can cause various health complications if not managed properly through diet, exercise, medication and insulin administration. The key roles of the pancreas and these hormones in maintaining blood glucose homeostasis are summarized.