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So, what exactly do you need to know about the heart? You do not
need to learn all the parts of the heart or be able to draw it.
You just need to understand what it does in your body and why it
does this. The information below should help you.
The heart is made of a special muscle. This muscle contracts (gets
tighter) and relaxes, over and over again. The blood is pumped out
of the heart and around the body. Click on the stars on the picture
to find out more.
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