Blood pressure itself carries a number of other properties, including its
temperature. It also carries one of our defenses against tissue damage, the
clotting platelets that prevent blood loss following injury. But what exactly
is it that causes blood to exert a pressure in our arteries? Part of the answer
is simple - the heart creates blood pressure by forcing out blood when it
contracts with every heartbeat. Blood pressure, however, cannot be created
solely by the pumping heart.
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