What a lovely question 🙂
Do you know about mucus? It is the scientific word for it! Your nose and sinuses make about a 1 liter of mucus every day…It is made by cells in membranes that run from your nose to your lungs. Mucus has a pretty important job, it keeps the lining of your nose moist and warms the air you breathe. When you breathe in air through your nose, it contains lots of tiny things, like dust, dirt, germs, and pollen. If these made it all the way to the lungs, the lungs could get irritated or infected, making it tough to breathe. Luckily, snot helps trap this stuff, keeping it in the nose and out of the lungs.