The mammalian pacemaker of the heart is the
A)bundle of HIS.
B)AV node.
C)SA node.
D)Purkinje fibers.
E)tricuspid valvE.

Question

Quizplus · Accepted Answer

The mammalian pacemaker of the heart is the SA (sinoatrial) node, located in the right atrium of the heart. It initiates the electrical impulses that cause the heart muscle to contract and create a heartbeat. The other options listed are important components of the electrical conduction system of the heart, but they are not the primary pacemaker.

The Mammalian Pacemaker of the Heart Is the