what is vein...
what is the meaning of heart beat...
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Veins are blood vessels that carry blood towards the heart. ... Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart.
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vein : Vien is a Rabbinical hasidic dynasty originating in present-day Vienna...
heartbeat: A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.
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