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How Your Heart Works

The human heart pumps blood to every part of your body. Learn about the different parts of the heart and watch our video about how a healthy heart works.

Your heart is the pump which powers your body. It supplies blood carrying oxygen and nutrients to every cell, nerve, muscle and vital organ in your body.

It sits in your chest between your lungs, slightly to the left of centre, and is protected by your rib cage.

Your heart is about the size of your clenched fist and weighs about 300 grams (that’s just over half a packet of butter).

For more information on how your heart works, visit the NZ Heart Foundation website here.