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10 April, 20:58

What actions of the heart make the first and second sound of a heartbeat?

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Answers (2)
  1. 10 April, 21:15
    0
    Closure of the mitral and tricuspid valves, and closure of the pulmonic and aortic valves.

    Explanation:

    The first sound results from closure of the mitral and tricuspid valves, which separate the upper and lower chambers of the heart. The second sound occurs as a result of closure of the pulmonic and aortic valves. Blood travels across these valves on its way to the lungs and heart.
  2. 10 April, 21:27
    0
    The first sound results from closure of the mitral and tricuspid valves, which separate the upper and lower chambers of the heart. The second sound occurs as a result of closure of the pulmonic and aortic valves. Blood travels across these valves on its way to the lungs and heart.
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