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A: effect of age on the rate of mucociliary clearance (MCC) from the nasal cavity (anterior nasopharynx) in 3-mo-old and 2-yr-old male mice. Data shown are means ± SE, n = 12 mice both groups. There was a statistically significant difference between the 2 groups, ***P ≤ 0.001. B: effect of age on the % beads cleared per 15 min from the lungs/trachea of 3-mo-old or 2-yr-old male mice; n = 10 both groups. There was a statistically significant difference between the 2 groups, **P ≤ 0.01.
