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1 Cards in this Set

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One description of a typical heart sound is "lub-dub"

What makes the first heart sound? (the "lub" )



A - Atrial contraction
B - Aortic and pulmonic valves
C - Ventricular filling
D - Mitral and semilunar valves
E - Atrioventricular valves
E - Atrioventricular valves