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The Circular Flow Model Is Used to Show the

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The circular flow model is used to show the


Definitions:

Terminal Branch

The terminal branch is the end part of a nerve or a blood vessel that does not continue further or branch out again.

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.

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