As the action of the stomach continues, more of the digested food escapes, until all that has been properly acted upon has passed out.
~7.

Intestinal Digestion.~--We sometimes eat butter with bread, or take some other form of fat in our food.

This is not acted upon by the saliva or the gastric juice.

When food passes out of the stomach into the small intestine, a large quantity of bile is at once poured upon it.

This bile has been made beforehand by the liver and stored up in the gall-bladder.
The bile helps to digest fats, which the saliva and the gastric juice cannot digest.
~8.~ The pancreatic juice does the same kind of work that is done by the saliva, the gastric juice, and the bile.