Pulmonary Physiology, Metabolic & Defense Systems of the Lung, Dr. D. Penney

Figure 13.01. Mechanisms of aerosol particle deposition include sedimentation via gravity, inertial impaction, and diffusion by Brownian motion.

Particles entering the respiratory tract are prevented from reaching the terminal bronchioles and alveoli by mechanisms which cause them to be caught by the mucous sheath lining the tubules. They are then removed by ciliary action and other mechanisms.

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