mucous membrane vs membrane

mucous membrane and membrane both are nouns.

Word	Noun	Adjective	Verb	Adverb
mucous membrane	Yes	No	No	No
membrane	Yes	No	No	No

As nouns, membrane is a hypernym of mucous membrane; that is, membrane is a word with a broader meaning than mucous membrane:

mucous membrane: mucus-secreting membrane lining all body cavities or passages that communicate with the exterior
membrane: a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants

Other hypernyms of mucous membrane include tissue layer.

mucous membrane (noun)	membrane (noun)
mucus-secreting membrane lining all body cavities or passages that communicate with the exterior	a thin pliable sheet of material
	a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants