Task: Metaphors
Come up with an original and creative metaphoric equivalent for the concept described below:
The medulla is part of the brainstem that controls vital functions.  It measures the amount of carbon dioxide in your blood in order to adjust your breathing rate..

Response: the driveshaft for yourr brain. Explanation: The medulla acts like the drive shaft in a car but for the brain
Human originality rating (0-100 scale): 35