The program host explains how fat cells and muscles send signals.

Sunday’s “NHK Special” aired the second part of its series, “The massive network of the human body,” focusing on fat cells and muscles in the human body. The program said the latest research has found that fat cells actually send signals to the brain to refrain from eating more when a person is full. The program also reported that signals sent by muscles are believed to be linked to enhanced memory and cancer prevention.