The heart's electrical impulses travel through specialized cells called what?
The heart's electrical impulses travel through specialized cells called what?
Pacemaker cells
Muscle cells
Erythrocytes
Nerve cells
The correct option is: Pacemaker cells
The electrical impulses in the heart travel through specialized cells called pacemaker cells, including those in the sinoatrial (SA) node and atrioventricular (AV) node.