Compression of morbidity can be defined as a. having the greatest number of healthy years and the fewest number of years with illness b. representing a low death rate from chronic diseases c. having a longer life d. postponing illness until such time as there is an adequate treatment or cur

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As cell after cell rapidly transmits the electrical charge, the entire heart contracts in one coordinated motion, creating a heartbeat. ... The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles.