Digestion

Up to now, there was debate whether digestion was chemical or mechanical in nature. In an experiment on hawks and dogs, Reaumur showed that it had to be both. Thus in addition to behaving like a mechanical machine, the body also has a chemical aspect.
 Rene-Antoine Ferchault de Reaumur France 1752 Digestion

Up to now, there was debate whether digestion was chemical or mechanical in nature. In an experiment on hawks and dogs, Reaumur showed that it had to be both. Thus in addition to behaving like a mechanical machine, the body also has a chemical aspect.