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: There many [[bronchiole]]s in the [[lung]]s.
: The [[bronchiole]]s connect to air sacs which contain several [[alveolus|alveoli]].
==Key Stage 4==
===Meaning===
The [[bronchiole]]s are small branches of the [[bronchi]] which link the [[alveolus|alveoli]] in the [[lung]]s to the [[trachea]].