Read the following statements and choose the correct option
Statement 1 : Atria receive blood from all parts of the body which subsequently flows to ventricles.
Statement 2 : Action potential generated at sino-atrial node passes from atria to ventricles.
Action mentioned in Statements 1 and 2 are synchronous. As when Atria receive blood from all parts of the body which subsequently flows to ventricles action potential is generated at sino-atrial node passes from atria to ventricles both these actions occur together.