Answer:
The Answer is Medulla.
Step-by-step explanation:
There are many parts of the brain which are responsible for the different functions.
Medulla is located in the brain stem in front of cerebellum. It is responsible for critical involuntary actions like breathing and heart rate. It control centers for heart and lungs.
Any damage to Medulla can result in death due to heart failure or blood pressure variation due to disturbed heart beat.