The digestive canal represents a tube passing through the...

Quote by Ivan Pavlov about body, world

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

Quote by Ivan Pavlov about body, world.

Ivan Pavlov

Ivan Pavlov 1849 - 1936, russian psychologist

Was born on: 14 sep 1849.
Died on 27 feb 1936, at 86 years old.

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