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1 the mucous membrane of the vocal folds are vibrating. 2  NOTE: the structure still moves depending on what configuration we want, but the mucous membranes is what is creating the vibrations.  Anterior Portion: Starts at the anterior commissure and goes posteriorly 1/3 of the vocal cords.
Mucous membranes line all body cavities that open to the exterior of the body. They line the digestive, respiratory, urinary and reproductive tracts. The epithelium varies depending upon the location. The underlying connective tissue is areolar and is called lamina propria. Mucous membranes are kept wet either by secretions or the fluids which they contain. Their name is derived from thick, viscous secretion, mucus, that is secreted onto the surface of most mucous membranes.