"Kahn produced a series of books during the 1920s on the inner workings of the human body using metaphors of modern industrial life. His modernist visualization was fitting since he was writing during a time of great industrial and technological change, especially in Germany." (Source)
Although we now know more about the human physiology than Fritz Kahn did, Henning Lederer in this preview clip has merely kept the illustration relevant to the 1920's interpretation. The sound design by David Indge similarly depicts the action in the animation with vintage industrial sound samples.
