Question

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what is respiratory system ?

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Answer 1

Answer:

AT 5:00 pm

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Explanation:

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Answer 2

Answer:

respiration is the sequence of even that result in the exchange of oxygen and carbon dioxide between and the body cell. every 3 to 5 second, nerve impulces stimulate the breathing process, or ventilation, which move air through a series of passages into and out of the lungs