I don't have much to say about this prompt, maybe because I am not in the health sector But i will say few words:
I have read something about rib in a book before now, although it was used in context. That was when I realised the word rib had other attached usage apart from the common meaning we know of. As I checked, the other meaning had their use too. I will liken rib as an essential part of the body, one of the parts of the body that is meant to protect other part.