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OpenStudy (anonymous):
When the heart valves do not completely close and blood leaks through, _______ occur. A. alveoli B. heart murmurs C. heart attacks D. pacemakers
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OpenStudy (petiteme):
Is it heart murmurs?
OpenStudy (anonymous):
If heart attacks are caused by blood clots, alveoli is a part of the lung and pacemarkers the heart it is B.
OpenStudy (petiteme):
Yay! ^_^
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