The cells of the SA node at the top of the heart are known as the pacemaker of the heart because the rate at which these cells send out electrical signals determines the rate at which the entire heart beats (heart rate). The cells that create these rhythmic impulses, setting the pace for blood pumping, are called pacemaker cells, and they directly control the heart rate. They make up the cardiac pacemaker, that is, the natural pacemaker of the heart. Hope this helps!
Hi !
Answer:
What are the advantages of playing competitive sports?
a)
unsportsmanlike behavior
The main difference between physical and mental health is that our emotions, our ability to work and our relationships are the main things to be influenced by our mental health. When our mental health is positive we can cope with ups and downs. Our mood is stable and we feel optimistic.
