ᐅ The physiologist who succeeds in penetrating deeper and deeper into the digestive canal becomes convinced that it consists of a number of chemical laboratories equipped with various mechanical devices. – Ivan Pavlov | QuotesTrue.com

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The physiologist who succeeds in penetrating deeper and deeper into the digestive canal becomes convinced that it consists of a number of chemical laboratories equipped with various mechanical devices.

Ivan Pavlov

Ivan Petrovich Pavlov (1957). “Experimental psychology, and other essays”

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