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Question 1 of 5
1. Question
If pressure in the lungs is higher than air pressure….
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Question 2 of 5
2. Question
If the pressure in the lungs is lower than external air pressure….
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Question 3 of 5
3. Question
Where does gas exchange take place?
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Question 4 of 5
4. Question
Which structure in the lungs is 1 cell thick?
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Question 5 of 5
5. Question
Which features assists with gaseous exchange?
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