Definitions for "Mucous membrane"
A soft, pink blanket that lines all of the natural openings/holes in the body. The mouth, eyes, nose, throat, vagina, anus and the hole in the penis (the urethra) have these linings. MEMBRANES have small holes in them. If a STD gets on it then it can go inside someone's body. You can look inside your mouth and see MUCOUS MEMBRANES. They are on the inside of your cheeks.
Membrane lining body cavities and canals that lead to the outside; chiefly the respiratory, digestive, and urogenital tracts.
the type of membrane which lines body cavities which are open to the exterior.