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Talja [164]
3 years ago
15

When do your lungs work the hardest

Biology
2 answers:
choli [55]3 years ago
6 0
Im guessing when your pushing your body 
Alisiya [41]3 years ago
5 0
When exercising is when the lungs work the hardest because you're using a lot of muscles and are running around and are using force in your body so the lung works really hard to make sure the body gets enough air while working out.
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