Since the SA node is at the top of the atrial mass, the atria contract from the top down. How does this increase the efficiency of atrial contraction? Do the ventricles have a similar arrangement? If so, how does it work?

Question

anonymous · Answer

As you know the SA is a pacemaker which helps in setting the rhythm of contraction so that the blood can flow to the ventricle and just like that there is a Atrio-ventrical node in the ventricles ,which is situated in the septum, which helps in pushing the blood to the lungs and the whole body.

anonymous · Answer

Thanks Xaria your the best!!!

anonymous · Answer

I truly hope that my answer was of some help to you
and
you're welcome :)