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SpyIntel [72]
3 years ago
8

In mammals, air enters lungs through tubes called _____, which branch into smaller tubules called _____, which extend out to tin

y air sacs called _____.
Biology
1 answer:
galben [10]3 years ago
5 0
 <span>In mammals, air enters lungs through tubes called _____, which branch into smaller tubules called _____, which extend out to tiny air sacs called _____. 
trachea; bronchioles; spongy tissue 
>> bronchi; bronchioles; alveoli 
bronchi; alveoli; gills </span>
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