The pancreas, also known as the pancreas, is a large, elongated gland that is located in the mid to upper abdomen of the body, behind the stomach in the upper abdomen, about slightly above the level of the navel. The pancreas is divided into three parts, including the head, body, and tail of the pancreas; the head is enlarged and located on the right side and is encircled by the duodenum; the body makes up the majority of the pancreas; and the tail ends toward the upper left side and gets along with the spleen. The interior of the pancreas is a transverse glandular duct that opens into the duodenal papilla. The pancreas is divided into two parts, the exocrine gland and the endocrine gland. The exocrine gland consists of a glandular duct and an alveolus, which secretes pancreatic juice, and the glandular duct is the channel for the drainage of pancreatic juice, which contains bicarbonate of soda, pancreatic protease, lipase, amylase, and so on. Pancreatic juice is discharged into the duodenum through the pancreatic ducts and has the role of digesting proteins, fats and sugars. Common pancreatic diseases include acute pancreatitis, chronic pancreatitis, pancreatic cancer, etc. If you experience pain and discomfort in the upper and middle abdomen, seek medical attention promptly.