Assertion: natural pacemaker | /r/HasProperty | the sinus node
Facets:
Source sentences:
text: Natural pacemaker: The natural pacemaker of the heart is the sinus node, one of the major elements in the cardiac conduction system, the system that controls the heart rate.
text: Your heart rhythm is normally controlled by a natural pacemaker (sinus node) located in the right atrium.
text: The natural pacemaker of the heart is the sinus node, which leads into the right atrium.