filum vs body structure

filum and body structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
filum	Yes	No	No	No
body structure	Yes	No	No	No

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

filum: a threadlike structure (as a chainlike series of cells)
body structure: a particular complex anatomical part of a living thing and its construction and arrangement

Other hypernyms of filum include anatomical structure, bodily structure, complex body part, structure.

filum (noun)	body structure (noun)
a threadlike structure (as a chainlike series of cells)	a particular complex anatomical part of a living thing and its construction and arrangement