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張鈺禾 張鈺禾
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Posts: 706
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6 years ago
The atrioventricular valves function to prevent:
 
  A) backward blood flow through the heart
  B) blood flow from the arteries to the veins
  C) blood flow from the capillaries to the venules
  D) blood flow from the capillaries to the arteries
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wrote...
6 years ago
Answer: A
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