Mucous membrane

noun

Definitions

Noun
  1. 1
    A membrane which secretes mucus. It forms the lining of various body passages that communicate with the air, such as the respiratory, genitourinary, and alimentary tracts including the mouth, nasal passages, vagina, and urethra.
  2. 2
    mucus-secreting membrane lining all body cavities or passages that communicate with the exterior wordnet

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