This 1933 Chinese health education poster analogizes the human body to an industrial factory, one in a series of images designed to help viewers better understand their own physiology.

The US National Library of Medicine has a great collection of these strikingly illustrated posters, as well as a second set of posters from 1951. Even without understanding the language, there is a lot to enjoy about the pictorial representations of human anatomy.

Understanding the Human Body [National Library of Medicine via Retronaut]