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mucus

The thick, slippery fluid made by mucous membranes that moistens and protects them.

MYOO-kus noun

What it means

A slimy fluid that coats the airways, nose, digestive tract and other linings. It traps dust and germs and keeps tissues moist. Mucus coughed up from the lungs is sputum or phlegm. Its color and thickness change with infection, smoking and fluid intake.

For the nurse

Fluids and humidity thin mucus so it is easier to cough up. Describe the color, amount and thickness of any secretions.

Remember it

Mucous with an "o" describes; mucus is the stuff.

At a glance

Spanishmoco, mucosidad

Easy to confuse with

mucous

Relating to mucus or making mucus, as in mucous membrane.

Related terms

secretion

A substance a gland or cell makes and releases, such as mucus, saliva, sweat or a hormone.

mucosa

The moist lining of body passages that open to the outside, such as the mouth, nose, gut and bladder.

cough

A sudden, forceful burst of air from the lungs that clears the airways.

mucous

Relating to mucus or making mucus, as in mucous membrane.

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