Final answer:
Tendinous cords are not part of the cardiac conduction system, which includes the SA node, AV node, AV bundle, and Purkinje fibers.
Step-by-step explanation:
In response to the student's question, tendinous cords are not part of the cardiac conduction system. The cardiac conduction system consists of the sinoatrial (SA) node, the internodal pathways, atrioventricular (AV) node, atrioventricular (AV) bundle (bundle of His), right and left bundle branches, and the Purkinje fibers. It is a network responsible for managing the heart rhythm, initiating and spreading the electrical impulse necessary for coordinated heart contractions. Tendinous cords, on the other hand, are part of the heart's mechanical structure; they anchor the heart valves to the papillary muscles and have no role in electrical conduction.