tarsus vs skeletal structure

tarsus and skeletal structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
tarsus	Yes	No	No	No
skeletal structure	Yes	No	No	No

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

tarsus: the part of the foot of a vertebrate between the metatarsus and the leg; in human beings the bones of the ankle and heel collectively
skeletal structure: any structure created by the skeleton of an organism

tarsus (noun)	skeletal structure (noun)
the part of the foot of a vertebrate between the metatarsus and the leg; in human beings the bones of the ankle and heel collectively	any structure created by the skeleton of an organism