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From equipment point of view, the respiratory system in the human body is a _________ system.(a) hydraulic(b) pneumatic(c) mechanical(d) electrical |
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Answer» The correct answer is (b) pneumatic The explanation is: Respiratory system is a pneumatic system in which an air pump (diaphragm) alternately creates negative and positive pressures in a sealed chamber (thoracic cavity) and causes air to be sucked into and forced out of a pair of elastic bags (lungs). Blood circulatory system is related to hydraulic system. |
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