The correct sequence of parts that carry cardiac impulses is
A)AV node, SA node, Purkinje fibers, AV bundle.
B)AV node, AV bundle, Purkinje fibers, SA node.
C)SA node, Purkinje fibers, AV node, AV bundle.
D)SA node, AV node, AV bundle, Purkinje fibers.

Question

Quizplus · Accepted Answer

The correct sequence of parts that carry cardiac impulses is first initiated at the sinoatrial (SA) node, which sends the impulses to the atrioventricular (AV) node. The AV node slows down the impulse before it is sent to the AV bundle (bundle of His), which then divides into right and left bundle branches, and further branches into Purkinje fibers, causing the ventricles to contract. Therefore, the correct sequence of parts that carry cardiac impulses is SA node, AV node, AV bundle, and Purkinje fibers, as described in option D.

The Correct Sequence of Parts That Carry Cardiac Impulses Is