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The veins walls are considerably thinner in comparison to arterial walls. The larger veins have a system of internal one-way valves which do not allow the blood from flowing downward under the pull of gravity when person stands up. When a human being...
In an adult, the pacemaker makes almost 72 impulses in a minute in the rest condition; it means that in one minute the heart goes through a full cardiac cycle around 72 times. Normally, as good the physical fitness of an individual is, as slower the...
Blood Circulatory system in our body is a system of large and small elastic vessels which transports or conveys blood throughout the body parts. In one day, blood pumped through the heart of a normal healthy adult at rest reaches around 2,100...
