Mucous membranes

Definition

Mucous membranes are moist linings found in various cavities and tubes of the body that are exposed to the external environment. They play a crucial role in protecting against pathogens by trapping and neutralizing them.

5 Must Know Facts For Your Next Test

1. Mucous membranes line body cavities such as the respiratory, gastrointestinal, and urogenital tracts.
2. They produce mucus, which can trap pathogens and contain antimicrobial enzymes like lysozyme.
3. Mucous membranes are an essential component of the body's first line of defense in the immune system.
4. Damage to mucous membranes can increase susceptibility to infections.
5. They contain specialized cells that help recognize and respond to invading microorganisms.

Review Questions

• What are mucous membranes, and where are they commonly found?
• How do mucous membranes contribute to the body's defense against pathogens?
• What can happen if mucous membranes become damaged?

Related terms

Pathogen:

A microorganism that can cause disease.

Lysozyme:

An enzyme found in mucus that breaks down bacterial cell walls.

Immune System:

The body's defense system against infectious organisms and other invaders.