The Heart's Function: A Closer Look
The heart relies on a specialized group of cells known as the sinoatrial (SA) node to regulate its activity.
The heart relies on a specialized group of cells known as the sinoatrial (SA) node to regulate its activity. These cells generate electrical impulses that travel through the heart, ensuring it beats in a steady rhythm.
Each time the heart contracts, it pumps blood from its chambers into the blood vessels, generating the pressure needed to circulate blood throughout the body. On average, the heart beats about 100,000 times per day, moving approximately 2,000 gallons of blood.
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