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Heart
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Organ found inside most animals
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I don't know why it's shaped like that but it do sure be pumping blood yeah

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The heart is a muscular organ found in most animals. This organ pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs. In humans, the heart is approximately the size of a closed fist and is located between the...