Mass of merging cells that act as a unit
Network of cardiac muscle cells connected by disc that leads to the coordination contraction of the atria
Network of cardiac muscle cells connected by junctions that leads to the coordination contraction of the ventricles
Coordinates events of the cardiac cycle
Cardiac Conduction System
Small, elongated mass beneath epicardium. In right atrium near opening of superior vena cava. Fibers are continuous of atrial syncytium
Sino Atrial (SA) Node
in the inferior portion of septum and just beneath the endocardium. Provides normal conductions pathway between atrial and ventricular syncytium.
Atriventricular (AV) Node
Enters upper part of inerventricular septum and divide into right and left bundle branches that lie just beneath the endocardium.
AV Bundle (Bundle of HIS)
Generates hearts rhythmic contractions.
Larger fibers carry impulses to distant regions of the ventricular myocardium much faster than cell to cell conduction could.