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how the heart works
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Uppruna mál: Enskt

How the heart works

Today, we talk about the object of his work. The heart is a complex organ that starts beating a few weeks after conception. At this point the heart is a tube. In the coming days, it grows and bends into the shape or the heart.

Later, it divides into four parts. As the heart beats, it pumps blood through these chambers and the blood vessels in the body. The body is estimated to have at least ninety six thousand kilometers of bloods vessels.
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necesito una traduccion exacta.
aqui no esta el texto completo pero si me pueden ayudar con esto gracias
Rættað av lilian canale - 29 Desember 2010 16:11





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29 Desember 2010 16:03

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