The visitor finds a map of the digestive system that starts from the mouth and ends at the anus.
On this map are represented some points where the visitor can call the probe of a stethoscope. In this way he will be able to listen to the different sounds produced by digestion: the air expelled from the mouth, the beating of the teeth due to chewing, the peristaltic movements of the stomach and intestine, the production of gas in the bowels and the air expelled from the anus.