Conducting System of the Heart - SA Node - TeachMeAnatomy The cardiac conduction system is a collection of nodes and specialised conduction cells that initiate and co-ordinate contraction of the heart muscle It consists of: Sinoatrial node; Atrioventricular node; Atrioventricular bundle (bundle of His) Purkinje fibres
Conduction System of the Heart: Path and diagram - GetBodySmart The nodal cells are organized into two clusters, or nodes, called the sinoatrial (SA) node and atrioventricular (AV) node The SA node is the one that generates the impulses which are then propagated to the atria of the heart and to the AV node
Conduction System Tutorial - Medical School The sinoatrial node is located in the upper part of the right atrium in the healthy heart, and serves as the natural pacemaker (Figure 1) These nodal cells manifest spontaneous depolarizations and are thus responsible for generating the normal cardiac rhythm; such a heart rate can also be described as intrinsic or automatic
Overview of Sinoatrial and Atrioventricular Heart Nodes - ThoughtCo The sinoatrial node is the heart's pacemaker, controlling the rhythm and rate of heartbeats The atrioventricular node delays impulses so blood can move from atria to ventricles before contracting A heart node is a specialized type of tissue that behaves as both muscle and nervous tissue