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From Biology-Online Dictionary
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(1) A lubricating membrane lining all body passages and cavities.

(2) Any lining containing mucous secreting glands.


Examples are those lining the mouth, nasal passages, vagina and urethra. They are involved in absorption and secretion.

Word origin: From Latin mūcōsa, feminine of mūcōsus, mucous

Also called: mucous membrane