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Home Q & A Board Biology-Related Homework Help General Biology
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Daddy667 Daddy667
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6 years ago
Airways of the mammalian respiratory system function to
 
  a. filter oxygen from carbon dioxide.
  b. moisten external air.
  c. cool external air.
  d. filter water out of the air.
  e. keep water out of the lungs.

Question 2

Which of the following muscles contract during forceful exhalation?
 
  a. the diaphragm
  b. external intercostals
  c. internal intercostals
  d. the diaphragm and external intercostals
  e. the diaphragm and internal intercostals
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ir_nizamir_nizam
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6 years ago
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Daddy667 Author
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#2
6 years ago
Thank you Slight Smile
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#3
6 years ago
Pleasure
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