explain human circulatory system with the help of a well labelled diagram ?
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The right atria receive the deoxygenated blood by the vena cava (collection of veins). The atria contracts and pumps the blood to the right ventricle. The right ventricle pumps the blood via pulmonary arteries to lungs for oxygenation. The oxygenated blood from the lungs moves to the heart via pulmonary veins.
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The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
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