Heart's Electrical System - stock photo
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Heart's Electrical System

Illustration depicting the heart's electrical system (yellow circuitry) with a normal EKG in the background. The sinoatrial (SA) node (thick yellow oval upper left) consists of self-excitatory muscle cells that contract rhythmically at around 70 beats per minute. Following each contraction, an impulse spreads through the heart's upper chambers (atria, upper frame) to the atrioventricular (AV) node (thick yellow oval opposite SA node). Contraction of the atria causes blood to move into the lower chambers (ventricles, lower frame).

Credit
Science Source / Monica Schroeder

Dimensions
3732 x 4604 pixels

Print Size @ 300 dpi
12 x 15 inches / 32 x 39 cm

Releases
Model No you may not need it
Property No you may not need it
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