"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"
This quote is written / told by Ivan Pavlov between September 14, 1849 and February 27, 1936. He/she was a famous Psychologist from Russia.
The author also have 21 other quotes.