How can the origin and conduction of the heartbeat be represented?

  • A
    $AV$ node $\rightarrow$ Bundle of $His$ $\rightarrow$ $SA$ node $\rightarrow$ Purkinje fibers
  • B
    $SA$ node $\rightarrow$ Purkinje fibers $\rightarrow$ $AV$ node $\rightarrow$ Bundle of $His$
  • C
    Purkinje fibers $\rightarrow$ $AV$ node $\rightarrow$ $SA$ node $\rightarrow$ Bundle of $His$
  • D
    $SA$ node $\rightarrow$ $AV$ node $\rightarrow$ Bundle of $His$ $\rightarrow$ Purkinje fibers

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