★ Heart Quiz
Heart sound __________ is thought to result from the transition from expansion of the empty ventricles to their sudden filling with blood.
A. S1
B. S2
C. S3
D. S4
E. S0
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What are the thick inferior chambers of the heart that pump blood into the arteries called?
A. Ventricles
B. Atria
C. Auricles
D. Trabeculae carneae
E. AV valves
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