From the described experiment it is clear that the mere act of eating, the food even not reaching the stomach, determines the stimulation of the gastric glands.

Appetite, craving for food, is a constant and powerful stimulator of the gastric glands.

Physiology has, at last, gained control over the nerves which stimulate the gastric glands and the pancreas.

Edible substances evoke the secretion of thick, concentrated saliva. Why? The answer, obviously, is that this enables the mass of food to pass smoothly through the tube leading from the mouth into the stomach.

As was to be expected, the discovery of the nervous apparatus of the salivary glands immediately impelled physiologists to seek a similar apparatus in other glands lying deeper in the digestive canal.

Don't become a mere recorder of facts, but try to penetrate the mystery of their origin.