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OpenStudy (anonymous):
What can your circulatory system best be compared to?
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OpenStudy (anonymous):
water and drainage system?pure water with something added (like oxygen in blood )is pumped to homes.....water is used to clean houses of wastes (cells of co2 )and this unclean water is passively brought back at low pressure trough drains (veins carry corbon dioxide carrying blood) to water purifying plant...and made pure water in treatment plant (lungs) then pumped (heaRT) at high pressure to homes thru water supply pipes (arteries)
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