Where inhaled air goes
I believe the answer is:
lung
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">where inhaled air goes</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lung that I've seen before include "Organ providing oxygen to the blood" , "Of sound mind" , "urban area" , "Organ used for breathing" , "Breathing apparatus" .)