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Biology, 28.09.2019 14:30 destinybowers18
Since the sa node is at the top of the atrial mass, the atria contract from the top down. how does this increase the efficiency of atrial contraction? do the ventricles have a similar arrangement? if so, how does it work?
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Since the sa node is at the top of the atrial mass, the atria contract from the top down. how does t...
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