the nose and mouth, which act as natural filters. The hairs inside the nose, called cilia, trap large particles and prevent them from entering the lungs. The mouth also filters large particles through the use of the tongue and tonsils. Additionally, the cough reflex helps to expel large particles from the respiratory tract.
Large airborne particles are primarily filtered by air filters. Air filters are devices made of mesh, fibers, or other porous materials that are designed to capture and remove particles from the air as it passes through the filter. The size and efficiency of air filters can vary, but they are generally effective at capturing larger particles such as dust, pet dander, pollen, and some larger bacteria. These filters are commonly used in residential, commercial, and industrial settings, and are found in HVAC systems, air purifiers, and other air filtration devices. The captured particles are typically trapped within the filter media and cannot reenter the airflow, thus improving indoor air quality. Regular maintenance and replacement of air filters is important to ensure their effectiveness.
