1. Tardigrade
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  3. Biology
  4. Heart beat originates in :

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Q. Heart beat originates in :

J & K CETJ & K CET 2003

Solution:

The heart beat originates from the Sinuatrial node ($SA$ node-pacemaker) which lies in the wall of right atrium near the opening of superior vena cava. The $SA$ node is a mass of neuro muscular tissue.