Several glands are involved in the digestion process. These include the salivary glands, glands in the stomach, and glands in the duodenum or small intestine. The liver is the largest gland involved in digestion by producing bile juice.The pancreas is a glandular organ in the upper abdomen and acts as both the endocrine and exocrine gland. It secretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Pancreatic juice is secreted by the pancreas located in the visceral region and is a major part of the digestive system. It contains a variety of enzymes like trypsin, amylase, trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, pancreatic lipase and nucleases. Pancreatic juice is alkaline in nature.