write in detail about 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. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs.
Artery: Aorta, pulmonary trunk and right and left pulmonary arteries, right coronary ar...
Vein: Superior vena cava, inferior vena cava, right and left pulmonary veins, great ca...
System: Circulatory
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