In fact, when we'll discuss the digestive system of the human body, we'll see that the pancreas can also act as an exocrine gland. Bud. Since we're on the topic of the endocrine system in this lecture, we're only going to focus on the endocrine capability of Aropankreas. Now, the collection of millions of cells inside the pancreas that have this endocrine capability, the ability to produce hormones and release these hormones into our bloodstream are known as the eyelids of Langerhons. And there are four major types of cells that make up that constitute the eyelids of Langerhans. These cells are alpha cells, beta cells, delta cells, and gamma cells.