Biology, 13.03.2021 02:00 haileysolis5
When birds inhale, air enters sacs around the lungs. When air is exhaled, it travels in tubes called alveoli through the lung. This shows how the system of birds works.
A. Respiratory
B. Nervous
C. Reproductive
D. Digestive
E. Circulatory
Answers: 2
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When birds inhale, air enters sacs around the lungs. When air is exhaled, it travels in tubes called...
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