The Purkinje cells are tightly bound together to form the AV bundle.

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The Purkinje cells are specialized cardiac muscle fibers that spread through the ventricles and are responsible for coordinating the contraction of the ventricles. The AV bundle, also known as the bundle of His, is a separate structure that connects the atria to the ventricles and plays a role in conducting electrical impulses through the heart. The Purkinje cells and the AV bundle work together to regulate the heartbeat, but they are not the same structure and are not tightly bound together.

The Purkinje Cells Are Tightly Bound Together to Form the AV