Final answer:
The NOT part of the cardiac conduction system is the atrioventricular (AV) valve. The cardiac conduction system includes the sinoatrial (SA) node, the atrioventricular (AV) node, and the atrioventricular (AV) bundle, along with other specialized structures such as the internodal pathways, bundle branches, and Purkinje fibers.
Step-by-step explanation:
The NOT part of the cardiac conduction system is the atrioventricular (AV) valve. The cardiac conduction system includes the sinoatrial (SA) node, the atrioventricular (AV) node, and the atrioventricular (AV) bundle, along with other specialized structures such as the internodal pathways, bundle branches, and Purkinje fibers. These components work together to coordinate the electrical signals that regulate the contraction of the heart.