Assertion: cardiac muscle's cell | /r/Synonym | the sa node
Facets:
Source sentences:
text: pacemaker: cluster of specialized myocardial cells known as the SA node that initiates the sinus rhythm
text: pacemaker: cluster of specialized myocardial cells known as the SA node that initiates the sinus rhythm
text: This collection of special cells known as the SA node (1) generate a rhythm slightly more rapid than that of either atrial or ventricular isolated cells and (2) synchronize both cell types via a system of specialized fibers that are even better at electrical conduction than are myocardial cells.