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'''Return to === from [[ICRP Glossary|GlossaryPublication 130]]''', 2015 === Part of the respiratory tract consisting of the anterior nasal passage (the ET<sub>1</sub> region) and the posterior nasal passage pharynx and larynx (the ET<sub>2</sub> region) as regions of the [[Human respiratory tract model]].
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[[File:Glossary Icon-2.png|100px|frameless|right|link=ICRP Glossary]]Part of the respiratory tract, consisting of (1) the anterior nose nasal passage, and (the ET1 region2) and the posterior nasal passagespassage, pharynx and larynx (, designated as the ET2 ET<sub>1</sub> region and ET<sub>2</sub> region). The oral part , respectively, of the pharynx was part of ET2 but it is excluded from ET2 and included [[Human respiratory tract model]] as defined in the HATM (Human Alimentary Tract Model)[[ICRP Publication 130]].
'''Return to [[ICRP Glossary entry - June 2019|Glossary]]'''
== Previous glossary entries ==