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Comparisons of the inhalable fraction (rat only) and deposition fractions of aerosol particles in each region of (A) a asymmetric Sprague–Dawley rat following a 4-h exposure to aerosol concentrations of 1.084, 2.0, and 5.212 mg/L and (B) Yeh and Schum symmetric human models following nasal and oral breathing at 5.212 mg/L under resting ventilation conditions. For human simulations, the inhalable fraction of particle sizes at 5.212 mg/L was 1.0 (see Table 1 for simulation details).
