It said to ask a followup question. but guess this site doesn't connect one question to the next. one doctor said, "your lungs are able to remove some dust via the ciliary elevator". i wanted to ask, "i take that to mean that some dust does stay in t

Little or no risk: If normal lungs and bronchi (no asthma, chronic bronchitis, etc), little or no dust remains in lungs. Flow of mucus carrying foreign particles ("ciliary elevator") brings it up to where it is swallowed and passes out the GI tract. This can be overwhelmed by very heavy exposure to certain dusts (e.g. silicosis or black lung in miners), but usually no health effects even with heavy dust exposure.