intratracheal instillation
... that intratracheal instillation, the introduction of a substance directly into the trachea, is a widely used alternative to inhalation for respiratory toxicity testing?
... that <b id="mwCGc"><a href="./Intratracheal_instillation" id="mwCGg" rel="mw:WikiLink" title="Intratracheal instillation">intratracheal instillation</a></b>, the introduction of a substance directly into the <a href="./Trachea" id="mwCGk" rel="mw:WikiLink" title="Trachea">trachea</a>, is a widely used alternative to inhalation for <a href="./Inhalation_exposure" id="mwCGo" rel="mw:WikiLink" title="Inhalation exposure">respiratory toxicity</a> testing?