Mucus is found in the mouth because when you suck your boogers deeper into your nose, some go down to your mouth.
-smartanomous
It is mucus that you coughed from your lungs.
siraulo kayo
Mucus
i don't know, but I'd go and see a veterinarian...
trench mouth
Digestive system .
Mucus is a sticky substance. Describe how mucus and cilia keep the lungs free of bacteria and dust particles.
No you can't (assuming there is no blood in it that is infected).
digestive system
acids
they keep out germs invading ur body
Tens of thousands of tiny droplets fly out of your mouth when you sneeze, along with bits of mucus from your nose.