Oxford University Press's
Academic Insights for the Thinking World
The human cardiovascular system relies on continuous circulation to ensure it functions to meet the needs of the body. Like a fish must remain in water, body organs and tissues require a constant supply of blood. A loss of blood flow, dependent on severity and duration, can result in a loss of oxygen,
Each successful beat of the heart is the result of a well-timed electrical orchestra, headed by a conductor tasked with tirelessly maintaining this life-sustaining rhythm. The conductor of this silent symphony is the heart’s natural pacemaker cells, which synchronize the muscular contractions necessary to pump blood throughout the body.