The heart is not controlled by anything, it is a myogenic muscle which means if you were to remove the heart from the body it would continue to beat.
However, the adrenal medulla is the part of the brain responsible for the release of adrenaline,when adrenaline is released, the SAN is stimulated to work faster and increases your heart rate, this happens when playing sports,or during a fight or flight response.
the SA node
antiarrhythmic
Your heartbeat
ther are no controlls
Valves have nothing to do with heart beat The pacemaker of the heart controls the heart beat
The nervous system controls the rate of the heartbeat and respiration.
medulla
heartbeat
The brainstem, specifically the medulla oblongata, controls functions like heartbeat, digestion, and breathing. It regulates these essential bodily functions through the autonomic nervous system.
It ia a specialized bit of heart tissue that controls the heartbeat.
medulla
Brain cells