This 12-15cm organ is located just below the stomach, and slightly
behind it. Around 99% of the pancreas is made up of small clusters of
glandular epithelial cells called acini, which is responsible for producing
the clear pancreatic juice which has many functions. These enzymes
enter the duodenum via two pancreatic ducts, which classifies it as an
exocrine gland. Pancreatic amylase is secreted for digesting
carbohydrates, trypsin to digest proteins and lipase to digest fats. The
remaining 1% of the pancreas contains cells which are arranged into
clusters called Islets of Langerhans. These cells directly secrete the
hormones Insulin and glucagon, needed to control the blood sugar level
into the bloody which also means the pancreas is an endocrine gland.