Why are the lungs made up of these
progressively smaller tubes and then
millions of tiny...
![subject](/tpl/images/cats/biologiya.png)
Biology, 20.04.2020 04:18 Tobymorgan3287
Why are the lungs made up of these
progressively smaller tubes and then
millions of tiny alveoli rather than each
lung just being a large empty sack?
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Answers: 1
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