Mucus
Definition: Mucus is a thick liquid produced by mucous glands and goblet cells. It prevents lung damage by keeping breathing passages moist. The function of mucus is to trap foreign particles so that they may be carried up the respiratory tract and expelled.
Source: Living with Lung Cancer by Cox, Carr, and Lee
Pronunciation: mew’ kus
Examples: In chronic bronchitis, mucus is overproduced, causing obstruction to the airways.
