With each meal, when edible substances find their way...

Quote by Ivan Pavlov

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With each meal, when edible substances find their way into the oral cavity, thick and viscous saliva containing much mucus flows out of these glands.
Ivan Pavlov

Quote by 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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