how does our lungs clean themselves from small things that get in them like dust?
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For a lot of the lungs, there are sort of little hairs that dance and move stuff up and out, until they trigger a cough or sneeze to happen and blast it all out your face. In the deep deep parts (alveoli), there are cops (white blood cells/macrophages) on patrol to snatch up anything that isn’t supposed to be there.
Normally, the lungs are a very clean environment, and people can get pretty bad infections (pneumonia) if they accidentally inhale food, especially older folks.
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