[A] : SA node is contraction centre or Pace Maker.
[R]: Nodal fibres of SA node are embeded in the wall of right atrium

SA node is located in:

SA node is located in

SA node is located in

SA node is located in

SA node is located in

S.A node is called pacesetter

Function of SA node is

Function of SA node is

Assertion. The S-A node acts as pace maker. Reason. The S-A node is located in the wall of the right atrium near the interatrial septum.