Question

location and function SA nodes

Answer 1

The heart's natural pacemaker – the SA node – sends out regular electrical impulses from the top chamber (the atrium) causing it to contract and pump blood into the bottom chamber (the ventricle). The electrical impulse is then conducted to the ventricles through a form of 'junction box' called the AV node.

Answer 2

SN  nodes  located  in  the  wall  of  right   atrium   it  main  function  is  to  produces  action  potential