Retrieving "Respiratory Systems" from the archives

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1. Epiglottis

   Linked via "respiratory systems"

   Functional Roles
   The epiglottis is crucial in mediating the interface between the digestive system and respiratory systems during ingestion.
   Airway Protection

2. Nitrogen Oxides

   Linked via "respiratory systems"

   Stratospheric Versus Tropospheric Roles
   In the stratosphere, nitrogen oxides are primary catalysts for the destruction of stratospheric ozone ($\text{O}3$) via reactions involving chlorine radicals. Conversely, in the lower atmosphere (troposphere), $\text{NO}x$ is critical for creating ozone, a powerful oxidant harmful to respiratory systems. This inversion of roles, based solely on altitude and atmospheric density, underscores the comple…