How the Heart Pumps Blood
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Video Transcript
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Your heart is a pump. With every beat, it pushes blood around your body
and ensures that your cells are supplied with oxygen, nutrients, and everything else
they need to survive. It is quite small – about the size of a closed fist – and,
on average, it beats 100,000 times each day. This animation illustrates what happens when
your heart beats and show how blood flows through it. The right side of the heart is shown
in blue: Blue is used to show blood that is low in oxygen. This is blood that is returning from
its journey around your body. Your heart pumps this blood to your lungs to be refreshed
with oxygen. The left side is red: Red indicates blood that is high in oxygen.
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