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Biology, 24.07.2021 06:20 kelsey4698

Which is not true regarding the mammalian cardiac cycle Group of answer choices

both atria contract at roughly the same time, and then the ventricles

relaxation, or filling, phase is called diastole

the semilunar valve is the usual pacemaker

contraction, or pumping, phase is called systole

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Which is not true regarding the mammalian cardiac cycle Group of answer choices

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