Question

a.Identify the part located in right atrium which regulates heart beat?

b.Write the working of it?​

Answer 1

Answer:

a) Sino atrial node

b) The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.

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