Assertion: cardiac muscle's muscle cell | /r/CapableOf | call pacemaker cells
Facets:
Source sentences:
text: Contractions of the heart (heartbeats) are controlled by specialized cardiac muscle cells called pacemaker cells that directly control heart rate.
text: Contractions of the heart (heartbeats) are controlled by specialized cardiac muscle cells called pacemaker cells that directly control heart rate.
text: Contractions of the heart (heartbeats) are controlled by specialized cardiac muscle cells called pacemaker cells that directly control heart rate.
text: Contractions of the heart (heartbeats) are controlled by specialized cardiac muscle cells called pacemaker cells that directly control heart rate.
text: The timing of contractions is normally determined by specialized cardiac muscle cells called pacemaker cells.