Q:

What structure in the heart prevents backflow of blood into the right atrium?

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What structure in the heart prevents backflow of blood into the right atrium?


  1. The tricuspid valve
  2. The bicuspid valve
  3. The mitral valve
  4. The foramen ovale

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A: The tricuspid valve lies between the right ventricle and right atrium and closes when the ventricle contracts.

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