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!
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The top 15 foods highest in vitamins include fish, dark leafy greens, seeds, broccoli, pork, beef, lamb, mushrooms, nuts, eggs, sweet bell peppers, avocados, peas, winter squash, and fruits.
Talk to a doctor, that’s what you should do
Low frequency diseases can be exclusively covered by what kind of health insurance policies? <span>Limited policies</span>
The answer is B. This represents a pandemic because the outbreaks took place in several different countries.
