A small patch of tissue called the _____ acts as the pacemaker of the heart.

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A small patch of tissue called the _____ acts as the pacemaker of the heart.

A small patch of tissue called the _____ acts as the pacemaker of the heart.
A) atrioventricular node
B) bundle of His
C) Purkinje fibers
D) sinoatrial node

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Divya. Author

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