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28 October, 02:43

Arrange these elements of the intrinsic conduction system in the order that a depolarizing impulse travels during a normal heartbeat. Rank from first to last. Do not overlap any tiles. 1. AV node2. Bundle Branches3. internodel pathways4. SA node5. Purkinje Fibers6. AV Bundle

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  1. 28 October, 05:15
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    1) SA Node

    2) Intermodal Pathways

    3) AV Node

    4) AV Bundle

    5) Bundle Branches

    6) Purkinje Fibers

    Explanation:

    The activity of heart is dependent on two nodes - a) Sinoatrial node and b) Atrioventricular Node. These two nodes are responsible for generating and initiating the electrical impulse that further stimulates the contraction of atria and ventricles.

    In the Atrioventricular Node, a bundle of connecting tissue receives signals for action from the SA node. These signals travel through the intermodal pathways to the left and right bundle branches. The bundle branches then transmit the signals to the Purkinje fibers which depolarizes the ventricular muscle cells. This leads to contraction of ventricular muscle cells.
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