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Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBody Fluids and Circulation1 Mark
MCQ
Pacemaker of heart is:
  • A
    SA node.
  • B
    AV node.
  • C
    Bundle of His.
  • D
    Purkinje fibres.
✓

Answer

  1. SA node.

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