The sa node acts as the pacemaker of the heart because these cells are __________.

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asked Sep 9, 2019 206k views

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Krzysztof Majewski · Answer 1 · 2019-09-15T12:53:39+0000

The heartbeat has two specialised areas of muscle (the sa node and the av node) that control and synchronise the heartbeat. The rhythm of relaxation and concentration of the pacemaker sets the rythym of the heartbeat.

The sa node acts as the pacemaker of the heart because these cells are __________.

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