syrinx vs body structure

syrinx and body structure both are nouns.

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

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

syrinx: the vocal organ of a bird
body structure: a particular complex anatomical part of a living thing and its construction and arrangement

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

syrinx (noun)	body structure (noun)
the vocal organ of a bird	a particular complex anatomical part of a living thing and its construction and arrangement
a primitive wind instrument consisting of several parallel pipes bound together