ciliary body vs membrane

ciliary body and membrane both are nouns.

Word	Noun	Adjective	Verb	Adverb
ciliary body	Yes	No	No	No
membrane	Yes	No	No	No

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

ciliary body: the part of the tunic of the eye between the choroid coat and the iris
membrane: a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants

Other hypernyms of ciliary body include tissue layer.

ciliary body (noun)	membrane (noun)
the part of the tunic of the eye between the choroid coat and the iris	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