SAN Full Form

The Sinoatrial node popularly known as SAN or the SA Node is the primary structure that is in charge of the taking place of a regular heartbeat. That is the reason the Sinoatrial node or SA Node is popularly known as the pacemaker of the heart. SAN is the primary component that is related to the conduction system of the cardiac. SAN is made up of specially made up of cells that are of cardiac muscles. The cells are bundled altogether inside the atrium of the right side in the form of a node. The cells of the Sinoatrial node own the potential of the self form of excitation. It is because of this the heart can contract on its own any innervations that are extrinsic.

The presence of the Sinoatrial node or the SAN is in the wall of posterolateral in the atrium of the right side. There are many functions pertaining to the Sinoatrial node or SAN. With respect to the system of cardiac conduction, San is one among the structures that are several in number. This system of conduction in the intrinsic form produces impulses that are required for the taking place of the heart’s contraction and thus makes sure that the blood flow is coordinated from the heart chambers. Some of the inclusions among the various components of the system are,

• SA Node or the Node of Sinuatrail
• AV Node or the Node of Atrioventricular
• AV Bundle or the Bundle of Atrioventricular
• Branches of the left and right
• Cells of Purkinje

The components that are remaining get synchronized to the pace the SA node cells deliver the impulses of the quicker speed and thus the Sinoatrial node plays the role of the pacemaker. Spreading of the impulses from the Sinoatrial node takes place throughout the atria making it contract well before they move to the node (AV) and then to all the above-mentioned components of the system of conduction. Between the fibres of specialized conduction, there is an allowance for the transfer of impulses at a quicker rate. Every structure of it has a varied localization and thus takes the charge of the cardiac muscle extraction in the heart in a specified area. Thus it permits the flow of coordinated blood from the heart chambers.

Conclusion

SAN or the Sinoatrial node is the structure that is primarily held responsible for the taking place of the heartbeat at a regular pace. Thus, for this reason, the Sinoatrial node is also known as the pacemaker of the heart. In the atrium of the right side inside of the wall of posterolateral owns the presence of the Sinoatrial node or the SAN. The Sinoatrial node produces the impulses that are required for the taking place of the heart’s contraction. This function assures that the from the chambers of the heart the coordination of the blood takes place. The deliverance of the impulses of the quicker speed takes place when the remaining components get synchronized to the pace of the SA node cells. In this way, the SAN plays the role of the pacemaker.