Question

Physical isolation of atrial muscle cells from ventricular muscle cells is a function of which of the following?

1. The internodal pathway
2. the cardiac skeleton
3. The Purkinje fibers
4. The AV bundle (of His)

Answer 1

The cardiac skeleton

Step-by-step explanation:

The cardiac skeleton is not a "true" skeleton, but it provides structure and support for the heart, as well as isolating the atrial muscle cells from ventricular muscle cells.