Answer:
There is not such a thing as a QRS wave and it is just another name for QRS complex which I'm sure you know represents ventricular polarization
Explanation:
Answer: the heart, the blood vessel, and the blood itself
Explanation: hope this helps
Answer:<em> Protein not only helps maintain muscle and bone mass, but it's also essential for body growth. Thus, deficiency or insufficiency is especially harmful to children whose growing bodies require a steady supply.</em>
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