They avoid dust entering the nostrils.
The correct spelling is "mucus."
mucus- mucus in the lungs makes breathing difficult
The word "mucus" is used with mucus membrane; mucus membrane secretes mucous.
The word "mucus" is a noun.
The scientific name for mucus is "sputum" when referring to mucus from the respiratory tract, and "phlegm" when referring to mucus from the throat or lungs.
mucus
mucus!!!!!!mucus trap the dirt in the trachea!
Mucus and a dust a mucus and a dust a mucus and a dust, the Addams Family!!!!!!
mucus
Yes its perfectly normal for mucus plug to be tinged Green or Yellow. Mucus plus means exactly that .. Mucus..
Mucus glands are exocrine, not endocrine, glands. They secrete mucus via ducts.