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Pace maker is

Instrument for measuring heart beats
Instrument for measuring pulse rate
Auriculo-ventricular node that provides impulse for heart beat
Sinu-auricular node that provides impulse for heart beat.
Additional Questions

Cells formed in bone marrow include

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Open vascular system occurs in

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Origin of heart beat and its conduction is represented by

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Oval depression of fossa is observed over

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Oxygen carrier in human blood is

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Oxygenated blood from lungs enters heart through

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Oxygenated blood occurs in

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Pace maker is situated in heart

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What is true about vein?

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Systole Is contraction of

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