Hey! Why does the heart make a lub-dub sound? Please explain in detail. Not just contraction and relaxation...
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The" lub" is the sound of the tricuspid and mitral valves closing. The" DUB" is the sound of the aortic and pulmonary valves closing. ... The second sound occurs as a result of closure of the pulmonic and aortic valves.
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The sound of a heartbeat is caused by the heart valves opening and closing as they pump blood. When the heart is working properly, blood can only flow in one direction. ... The" lub" is the sound of the tricuspid and mitral valves closing. The" DUB" is the sound of the aortic and pulmonary valves closing.
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