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jawaherr24 jawaherr24
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6 years ago
Which statement about the respiratory system and oxygen needs is correct?
 
  a. To meet oxygen needs, respiratory struc-tures must be intact by the time they are 2 years old.
  b. To meet oxygen needs, alveoli must ex-change O2 and CO2.
  c. To meet oxygen needs, the airway must be open 50 of the time.
  d. To meet oxygen needs, oxygen therapy is needed.
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6 years ago
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