Submitted by Anomaly-Friend t3_11ymdjl in askscience
Minus-Celsius t1_jdcs256 wrote
Reply to comment by Jfrog1 in (Biology) How far down your spine can you break before respiratory impairment? by Anomaly-Friend
Wait you googled SA node and you still think you're not wrong?
Damn, dude.
The brain controls the SA node, but the SA node can function without the brain. There's also a ventricular pacemaker. There's backups to the backups. The heart is an important organ.
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