Mars of nodal tissue at lower left corner of right atrium cells to atrio-ventricular septum called
AV Node
SA Node
Purkinje fibre
Bundle of Itis
atrio-ventricular node (AVN)-
Another mass of this tissue is seen in the lower left corner of the right atrium close to the atrio-ventricular septum called the atrio-ventricular node (AVN).
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Correct option is 1