Clavicule question!!?

Question

I had a question regarding clavicules! I realized recently that many people have a different structure of clavicules, i.e some people have their clavicules popping out under the neck while others don't but their clavicules are prolonged all the way to their shoulders and how come some really slim people don't have their clavicules showing while some overweight people do?

Answer 1

The clavicle (collarbone) is not straight, but S-shaped.  The degree of curve partly determines how visible the bone is; also the amount of muscle covering, and fat to some extent, as you say.  If you have a strongly curved clavicle, it will show up more than if you have a relatively flat one.