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meriva
3 years ago
9

Which of the following is a group of cells that sends signals to control the heart rate? Atrium Pacemaker Septum Valve

Biology
2 answers:
LUCKY_DIMON [66]3 years ago
4 0
It is atrium pacemaker i think
Mashutka [201]3 years ago
3 0
Should be Pacemakers
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