Examlex
You write a reminder post-it and stick it on the door where you see it every day.A month later, you forget your appointment because of the tendency to ignore constant stimuli, which is known as _____.
Pacemaker
A device that delivers electrical impulses to the heart to regulate the heartbeat, used in cases of arrhythmia. Another reference is to specialized heart cells that naturally set the rhythm of the heart.
SA Node
The sinoatrial node, known as the heart's natural pacemaker, which initiates the electrical impulses that dictate heart rhythm.
Coronary Veins
Veins that drain deoxygenated blood from the myocardium (heart muscle) into the right atrium.
Myocardium
The muscular tissue of the heart, responsible for the contraction and propulsion of blood.
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