Examlex
A position taken by social scientists who see human behavior as highly determined by one's position in the social class structure.
AV Node
The atrioventricular node, a part of the heart's electrical conduction system that delays the signal before it passes to the ventricles.
SA Node
The sinoatrial node, a group of cells in the right atrium of the heart that regulates the heart's rhythmic contractions.
Pacemaker
A device implanted in the body that delivers electrical impulses to the heart to regulate the heartbeat.
Purkinje Fibers
Specialized fibers located in the heart that conduct electrical impulses responsible for the rhythm of the heart muscle.
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