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Mucous membranes

Mucous membranes are tissues that line body cavities or canals such as the throat, nose, mouth, urethra, rectum, and vagina. Mucous membranes produce a thick, slippery liquid called mucus that protects the membranes and keeps them moist.

Current as of: May 1, 2026

Author: WebMD Ignite Staff

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All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

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This content has been reviewed by the oncology specialists with New Jersey Cancer Care, PA.