The pancreas is a long, tapered organ located across the back of the abdomen behind the stomach. The right side of the organ, called the head, is the widest part of the organ and lies in the curve of the duodenum, which is part of the small intestine. The pancreas has two different types of tissue. One is the exocrine tissue which secretes digestive enzymes. The other is the endocrine tissue. The hormones secreted by the endocrine tissue in the pancreas are insulin, glucagon, and somatostatin. Insulin and glucagon regulate the level of glucose in the blood. Somatostatin prevents the release of insulin and glucagon in the instance that there is too much of the other two hormones.