The atria begin to contract following
A. depolarization of the atria and pump blood int...
Biology, 14.04.2020 18:34 laceybabin1952
The atria begin to contract following
A. depolarization of the atria and pump blood into the ventricles.
B. When the pressure falls below that of the atria, blood moves from the atria into the ventricles, opening the atrioventricular valves and marking one complete heart cycle.
C. The ventricles begin to contract, raising pressure within the ventricles.
Answers: 3
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