asked 122k views
2 votes
The respiratory tract is a passageway for air between the external environment and the ____________ (air sacs) of the lungs.

asked
User Marbel
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8.2k points

1 Answer

5 votes
Mono molecule——jdjdndndjdjdkdkdd
answered
User Xeren Narcy
by
8.3k points
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