The cardiac cycle begins in the sinoatrial node (SA node)and ends in the Purkinje fibers.

Name: The cardiac cycle begins in the sinoatrial node (SA node)and ends in the Purkinje fibers.
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The cardiac cycle starts with the electrical impulse generated in the sinoatrial (SA) node, which then travels through the atria, AV node, bundle of His, bundle branches, and ends in the Purkinje fibers, coordinating the heart's contraction and relaxation phases.

The Cardiac Cycle Begins in the Sinoatrial Node (SA Node)and