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The first Iron Age empire was built in which region?
SA Node
The sinoatrial node, a group of cells in the right atrium of the heart that initiates the heartbeat, acting as the natural pacemaker.
AV Node
The atrioventricular node, a part of the heart's electrical system that regulates the timing of electrical impulses passing from the atria to the ventricles.
Cardiac Conduction
The process by which the heart's electrical system transmits signals, initiating heartbeats and ensuring the heart beats in a coordinated manner.
Sinoatrial Node
A small body of specialized muscle tissue in the heart that acts as a natural pacemaker, initiating the heart's electrical impulses.
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