| sinoatrial node |
pacemaker: a specialized bit of heart tissue that controls the heartbeat
출처: wordnet.princeton.edu/perl/webwn
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| sinoatrial node |
A specialized cluster of cells in the heart that initiates the heart beat. Known as the heart's natural pacemaker.
출처: www.clevelandclinic.org/heartcenter/pub/glossary/s...
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