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Continue to ChatThe digestive canal is in its task a complete chemical factory. The raw material passes through a long series of institutions in which it is subjected to certain mechanical and, mainly, chemical processing, and then, through innumerable side-streets, it is brought into the depot of the body. Aside from this basic series of institutions, along which the raw material moves, there is a series of lateral chemical manufactories, which prepare certain reagents for the appropriate processing of the raw material. - Ivan Pavlov from https://whatsmyquote.com/quote/the-digestive-canal-is-in-its-task-a-complete-chemical-factory-the-raw-material-passes-through-a-long-series