Answers

2014-06-07T20:53:42+08:00
The main stem represents the trachea, the smaller stems represents the bronchi, the smallest stems represents the bronchioles,the grapes represents the alveoli and the bunch of grapes represents the lungs.
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2014-06-08T10:10:55+08:00
Main stem = trachea                                                                                                   the large branching stems = bronchi                                                                             the little stems = bronchioles                                                                                       the individual grapes = alveoli
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