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Biology, 16.11.2019 08:31 michael3592
Which of the following occurs in the upper respiratory system?
a)air enters the alveoli
b)air enters the bloodstream
c)air is filtered and moistened
d)air is delivered to muscles
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Answers: 1
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Which of the following occurs in the upper respiratory system?
a)air enters the alveol...
a)air enters the alveol...
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