Famous quote by Ivan Pavlov


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"The digestive canal represents a tube passing through the entire organism and communicating with the external world, i.e. as it were the external surface of the body, but turned inwards and thus hidden in the organism"

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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.

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