Question : Read the following statements and choose the correct option. Statement 1 : Atria receive vlood from all parts of the body which subsequently flows to ventricles. statement 2 : Action potentail generated at sino-atrial node passes drom atria to ventricles.

Question : Read the following statements and choose the correct option

1.	Question : Read the following statements and choose the correct option. Statement 1 : Atria receive vlood from all parts of the body which subsequently flows to ventricles. statement 2 : Action potentail generated at sino-atrial node passes drom atria to ventricles.
Answer» Action mentioned in statement 1 is dependent on action mentioned in statement 2 Action mentioned in statement 2 is dependent on action mentioned in statement 1 Action mentioned in statement 1 and 2 are independent of each other. Action mentioned in statement 1 and 2 are synchronous. Solution :Blood ENTERS into right and left atria through vena CAVA and pulmonary VEIN . MUSCLES of atrium apread beginning of contraction from SA node to Av node and Parkinje fibers.