The normal pacemaker of the heart is the

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The normal pacemaker of the heart is the sinus node, which is situated in the wall of the right atrium near the opening of the superior vena cava. The sinus node generates electrical impulses that spread through the atria and stimulate them to contract, initiating the heartbeat. The AV node and Purkinje fibers are also involved in the conduction of electrical impulses in the heart, but they do not serve as the primary pacemaker. The coronary sinus is a vein that brings deoxygenated blood from the heart muscle to the right atrium, and it is not involved in the pacemaking process.

The Normal Pacemaker of the Heart Is the