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Question
Answer the following:
Which part of heart is responsible for initating and maintaining its rhythmic activity?
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Solution
SA node or Sino Atrial Node is responsible for rhythmic activity. The SA (sinoatrial) node sends an electrical signal to the upper chambers of the heart (atria). The signal then travels to the lower heart chambers (ventricles) through the AV (atrioventricular) node, which causes them to contract, or pump. The heart's pacemaker is known as the SA node.
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