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Q. |
From equipment point of view, the respiratory system in the human body is a system. |
A. | hydraulic |
B. | pneumatic |
C. | mechanical |
D. | electrical |
Answer» B. pneumatic | |
Explanation: 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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