Nikolas
Created page with "The heart has a special system that allows it to be excited rhythmically and repetitively. There are two components to this system: # Pacemaker generators that generate regular and rhythmical electrical impulses which initiate rhythmical contraction of the heart muscle # A conduction system which conducts these impulses rapidly throughout the heart in a coordinated fashion When this system functions normally the atria contract one sixth of a second before the ventricle..."