Physiology is basically described as the study of plants and how they grow and then later referred to the movement of the human body.  The tiny camera used to study the minute movements of the body such as the growth of cells and the advancement of the camera to study other movements of the body, have allowed researchers to discover medical answers to many ailments and our life span has been prolonged since the beginning of the 20th century. 

In 1978 Stephen Heath dismisses the scientific aspect of the cinema when he used the term ‘machine interest”.   He emphasizes that the machine is being promoted and sold, not the scientific uses that the machine was created to do, such as, view the movements of the body. Lumiere made his contribution to science and the body by inventing the cinematographe. 

Although he did not understand the full extent of his contribution to physiology, his counterparts understood it and gained recognition for their use of the devices, Etienne-Jules Marey and Eadweard Muybridge.  Lumiere was most notably remembered for the commercial aspect of the cinema and his films. 

We want to focus on the science aspect of the invention, not the technological so, lets not look at the various apparatus’ but what's inside:

Microscope -  shows moving cells
Sphygmoscope – a visible pulse
Cardiograph – tracing the heartbeat
Photograph – showing the body