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The heart's main function is to pump blood throughout the body, delivering oxygen and nutrients to cells and removing waste products. 

How it works

The heart is a muscular organ that contracts and relaxes to pump blood. 

The heart has four chambers, each separated by valves that control blood flow. 

The heart's electrical system controls the rate and rhythm of your heartbeat. 

The heart beats about 60 to 100 times per minute, 24 hours a day. 

With each beat, the heart pumps oxygen-rich blood to the body and oxygen-poor blood to the lungs. 

The blood returns to the heart after delivering oxygen to the body's cells. 

The heart then pumps the blood to the lungs to pick up more oxygen. 

What it does for the body 

Delivers oxygen and nutrients to the body's organs and muscles

Removes carbon dioxide and waste products from the body

Helps the body's organs and muscles work properly
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