Question

question
physical isolation of atrial muscle cells from ventricular muscle cells is a function of which of the following?
answer
the fibrous skeleton
the purkinje fibers
the av bundle (of his)
the internodal pathway

Explanation:

The fibrous skeleton of the heart physically isolates atrial muscle cells from ventricular muscle cells. The Purkinje fibers are involved in conducting electrical impulses in the ventricles. The AV bundle (of His) conducts impulses from the atria to the ventricles. The internodal pathway conducts impulses between the atrial nodes.

Answer:

The fibrous skeleton