Now, Somatostatin doesn't only inhibit glucagon, it also actually inhibits our insulin. So Somatostatin has a wide range of functions, and one of its function is to inhibit the release of both glucagon and our insulin. And finally, we also have a type of eyelid of Langerhan, a type of cell in that region known as gamma cells. And these cells are responsible for secreting a type of hormone known as our pancreatic polypeptide. And this hormone is basically believed to regulate various activities of the pancreas, such as our excretion of the pancreatic hormones that we've just discussed. So these are the four different types of cells that make up the eyelids of Langerhons inside Arop pancreas.