How intestinal juice helps in digestion?

Intestinal juice, clear to pale yellow, watery secretion composed of hormones, digestive enzymes, mucus, and neutralizing substances released from the glands. The process of digestion starts from mouth via mechanical process involved in tearing down of food into minute pieces with the help of teeth and tongue. The salivary glands located in the mouth produce saliva which helps in this mechanical breaking down and digestion. Saliva is made up of mucus, electrolyte, water and some digestive enzymes like amylase that are good in digesting starch and sugar. In the stomach, gastric juices are produced that are colorless and are highly acidic in nature. These are produced by the gastric glands present inside the stomach. This gastric juice consists of pepsin and rennin that help in breaking of protein into tiny units. The half dissolved food then reaches duodenum where the digestive juices of two types are released. First is the pancreatic juice which is made up of varied digestive enzymes like amylase, lipase and tripsin. Also bile or gall juice is secreted in this part of digestive system. Bile is made up of salts that are known to emulsify fats so that they get absorbed by the linings of intestine. Both these juices are alkaline in nature and are opposite to gastric juice in properties due to which the balance in the entire digestive system is maintained. This helps in more absorption of nutrients. The intestines release a digestive fluid called as succus entericus that helps in completing the digestion by breaking down macro molecules of proteins and fats.