|
(Hint: Think about where air is moving, and where the junk could be coming from.)
What happens to the junk when you breathe it in?
(Hint: Some gets caught in those hairs in your nose. Some gets caught in mucus in your airways. And some gets into your lungs.)
What does the junk look like up close?
Examine your collectors with a magnifier if you have one.
|
