The correct answer is D. All of the above.
The pancreas is a glandular organ located in the abdomen. It is both an endocrine gland and an exocrine gland. As an endocrine gland, it secretes hormones such as insulin and glucagon into the bloodstream. As an exocrine gland, it secretes pancreatic juice into the small intestine.
Insulin is a hormone that helps the body use glucose for energy. Glucagon is a hormone that helps the body store glucose. Pancreatic juice is a digestive fluid that helps the body break down food.
The pancreas is a vital organ that plays a role in many important bodily functions. It is important to keep the pancreas healthy by eating a healthy diet and getting regular exercise.