Final answer:
The pancreas is a heterocrine gland that contains exocrine and endocrine cells. The pancreatic islets secrete different endocrine hormones.
Step-by-step explanation:
The pancreas would best be described as a heterocrine gland, as it contains both exocrine cells that excrete digestive enzymes and endocrine cells that release hormones. The pancreatic islets, also known as the islets of Langerhans, are clusters of cells that secrete different endocrine hormones, such as glucagon, insulin, somatostatin, and pancreatic polypeptide.