The statement is False.
Smaller particles as small as 2.5 microns can pass in the body and can cross the defense mechanism thus causing dangers to health.
The size of the particle really matters, as something as small as 10 micrometer particle can also get into bloodstream causing health problems.
In respiratory track blockage, the airway can become narrowed or blocked due to many causes, the throat or trachea can be swelled and closed.
The dust surrounded by the mucus is pushed upwards with the help of cilia present in the bronchioles and bronchi. This dust comes out in cough, spit from the throat. Still smaller particles of dust might reach the alveoli. Even big diseases like asthma and heart diseases can be caused by very minute particles.
Thus, if the size of the particle if 100 micrometer or 10 micrometer, a disease can occur, if precaution is not taken into care.
To know more about respiratory track blockage, click on https://brainly.com/question/4693188
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