What is blood vessel??
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Blood vessels are the channels or conduits through which blood is distributed to body tissues. The vessels make up two closed systems of tubes that begin and end at the heart. One system, the pulmonary vessels, transports blood from the right ventricle to the lungs and back to the left atrium
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Blood vessel form a closed network of tubes to reach all the tissue. Thus the blood pushed by the heart flows in the blood vessel and also comes back to the heart in the blood vesselll.
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