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The circulation of blood in the human body is a continuous and highly organized process that ensures the transport of oxygen, nutrients, hormones, and other essential substances to tissues while removing carbon dioxide and metabolic wastes. The cardiovascular system consists of the heart, blood, and blood vessels, all of which work together to maintain an efficient circulation. The heart is a muscular organ located in the thoracic cavity between the lungs. It functions as a double pump with four chambers: the right atrium, right ventricle, left atrium, and left ventricle. The right side of the heart receives deoxygenated blood __________ _______ ___ _________ ______ _____ ________ ______ ____ ________ __________ ____.
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