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LRotundo LRotundo
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6 years ago
A small patch of tissue called the _____ acts as the pacemaker of the heart.
 
  A) atrioventricular node
  B) bundle of His
  C) Purkinje fibers
  D) sinoatrial node
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tiss9889tiss9889
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LRotundo Author
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6 years ago
Correct Slight Smile TY
bioc
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bahajo
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2 hours ago
Brilliant ツ
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