The Mucus reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Mucus

Mucus is a slippery secretion of the lining of various membranes in the body (mucous membranes). It protects the tissues from drying out and from injury.

Mucus is a viscous colloid containing antiseptic enzymes and immunoglobulins.

Increased mucus production in the respiratory tract is a symptom of many common diseases, such as the common cold. The presence of mucus in the nose and throat is normal, but increased quantities can impede comfortable breathing and must be cleared by blowing the nose or expectorating phlegm from the throat. Among the components of nasal mucus is tears.

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