Question

respiration
We have slime inside our nose and lungs called ____________, which traps ____
_________ and ____________ and keeps it from __________________________.
21. Cigarettes put _______________ and _______________ into your lungs

Answer 1

We have slime inside our nose and lungs called mucus, which traps dust, pollen, and bacteria and keeps them from entering the lungs.

21. Cigarettes put tar and nicotine into your lungs.