explain circulation of blood in human being
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The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta) which deliver it to body parts. then veins take it to heart. then it goes to lungs for purification
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The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
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