Examlex
A ________ contains one type of information,such as last names.
SA Node
Known as the sinoatrial node, it is the natural pacemaker of the heart located in the right atrium, initiating the heart's electrical impulses.
Pacemaker
A device or biological mechanism that sets the pace or rhythm for certain processes, especially the heart's rhythm.
AV Node
The atrioventricular node, a crucial part of the heart's electrical conduction system, controlling the heart rate by delaying the transmission of electrical impulses from the atria to the ventricles.
Interventricular Septum
The thick wall separating the lower chambers (ventricles) of the heart, preventing the mixing of oxygenated and deoxygenated blood.
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