The Useless Digest A Free Weekly dose of Facts, Quotes, History and more - direct to your inbox. Mucus is the thin, slippery material that is found inside your nose.
Many people call mucus snot.
Your nose makes nearly a cupful of snot every day. Snot is produced by the mucous membranes in the nose, which it moistens and protects. When you inhale air through your nose, it contains lots of tiny particles, like dust, dirt, germs, and pollen. If these particles made it all the way to the lungs, the lungs could get damaged and it would be difficult to breathe. Snot works by trapping the particles and keeping them in the nose.