The pacemaker is situated in the heart

in the walls of right atrium

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on the interauricular septum

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on the interventricular septum

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in the wall of left atrium

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Solution

The correct option is A
in the walls of right atrium

The correct option is (A)
Explanation of the correct option:
The pacemaker or Sino Atrial Node is situated in the upper right corner of the walls of the right atrium of the heart.
The pacemaker initiates the heartbeat and controls the heartbeat.
Final Answer: The pacemaker is situated in the heart in the walls of the right atrium.

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