Ivan Pavlov was born in a small village in central Russia. His family hoped that he would become a priest, and he went to a theological seminary. After reading Charles Darwin, he found that he ...

In 1894, Ivan Pavlov summarized the physiological state of knowledge about digestion in this way: The digestive canal is in its task a complex chemical factory. The raw material passes through a ...

While researching digestion in dogs, Ivan Pavlov noticed that the dogs began to drool as soon as they saw the white coats of the people who fed them; before they could even see or smell their food.