Glucagon is a hormone found within the alpha cells of the pancreas in Homo sapiens. Its primary function is to raise blood glucose levels in order to prevent hypoglycaemia and maitain a constant internal environment. The hormone achieves this through the conversion of stored glycogen to glucose, glucose can then be secreted into the blood stream to raise blood glucose levels. Glucagon is used in conjunction with insulin. Together they are used to regulate the blood glucose levels as insulin decreases the level whilst glucagon is used to raise it.