The normal heart rhythm begins in the____________________ which acts as the _____________________ of the heart.
A)sinoatrial node; pacemaker
B)bundle of His; conductor
C)Purkinje fibers; bundle branches
D)ventricles; muscles
E)systole; gateway

Question

Quizplus · Accepted Answer

The sinoatrial node is the center of modified cardiac muscle fibers in the wall of the right atrium that acts as the pacemaker for the heart rhythm. The word breaks down into the suffix -al meaning pertaining to, the root/combining form sin/o- meaning sinus, and the root -atri- meaning entrance, atrium.

The Normal Heart Rhythm Begins in The____________________ Which Acts as the _____________________

The Normal Heart Rhythm Begins in The Which Acts as the _