Answers

2014-06-08T23:04:04+08:00
Because we have these part , which we called Alveolus
Alveolus are the air sacs of the lungs, where the exchange of oxygen and carbon-dioxide takes place
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2014-06-08T23:25:57+08:00
The 2 branches of it represents the bronci, the smaller branches prepresents the bronchioles and the seeds itself represents the alveoli or thr airsacs..

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