Which of the following is mixed with the food in the small intestine?

Food travels from the stomach into the duodenum and undergoes chemical changes as it travels through the duodenum and jejunum. 

Pancreatic juice, bile, and succus entericus are all mixed with the food in the small intestine.

The pancreatic juice is made up of salts, mucus, and the enzymes amylase (also known as amylopsin), trypsin, and lipase (also known as steapsin). 

Mucus, bile acids, bile salts, and bile pigment are all components of the greenish-brown liver bile discharge. Invertase, maltase, lactase, and enterokinase are the four key enzymes that make up the succus entericus.