Liver: The liver performs both exocrine and endocrine functions. The exocrine function is related to the production (secretion) of the bile which is passed through a duct system into the duodenum. Many liver products are directly disposed into the blood stream which is directly linked with the endocrine function. An important function of the liver is the synthesis and secretion of lipoproteins and proteins such as albumins, fibrinogen and yolk vitellogenin. Many digestion products are neutralised in the liver and hormones and biogenic amines are deactivated here. Pancreas: With regard to structure and function, fish pancreas may be divided into two parts: exocrine and endocrine parts. The exocrine part produces digestive enzymes (including elastase, amylase, trypsin, chymotrypsin, phospholipase A, carboxypeptidase A, bile salt-dependent lipase) that pass through the pancreatic duct into the anterior intestine. These enzymes break down proteins, carbohydrates, fats and nucleotides. The endocrine part of the pancreas secretes peptide hormones such as insulin, glucagon, somatostatin and pancreatic polypeptide, which influence the level of lipolysis, glicogenolysis and gluconeogenesis.