Heart

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The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and .Heart is an American rock band that first found success in Canada and later in the United States and worldwide. Over the group s four decade history, it has had .The heart has four chambers The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle. The left ventricle the strongest chamber pumps oxygen rich blood to the rest of the body..