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CGP EDU Academic Team
Published on: August 14, 2026
Contraction of the ventricle in the heart begins by the command from
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SA is the site of generation of the rhythmic cardiac impulse. AV node is a compact mass of myogenic fibres which receives impulse from SA node and transmits it to ventricles. Purkinje fibres are in contact with the contractile muscles of the ventricular walls. Chordae tendinae are the muscles which keep the 
valves in position.
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