Dragons means, despite, something familiar at different to slay like the not faithful catholic ones happened in the bloody crusades. They the absolute the epidemics created by the devil and according to the catholic religion this evil entity shall be exorcize directly with fire and formulas like in the witches hunt in the middle-ages.

An occidental dragon's bones are very strong, but hollow and light. A dragon's jaw is large to accommodate the very strong muscles around it. The dragon is able to dislocate its jaw, as some snakes are able to do, to grab large objects.

The dragon has two types of teeth because of it being an omnivore (It will eat meat and plant food). The canine and incisor teeth of a dragon are long and razor sharp, but also have molars to chew their food instead of eating it whole.

The shoulder bones are thick to handle the large wing muscles needed to fly. The wing "finger" bones are very long to wrap the thin flight membrane taut around them. There are many species of Western dragon, and this is only one example showing the different bones of the skeletal system.

The wing is essentially instead another arm and hand (depends from the type). If you look at the skeleton of a dragon front arm and claws, you will notice that the wing is just a very stretched out version. The two thick "arm bones" (humerus and wing radius) runs from the body of the dragon attaching itself with cartilage and muscle to an "elbow" of the wing. 

There are usually 4 or 5 elongated "fingers" on a wing each ending in a claw. One short "thumb" claw is at the "wrist". The "fingers" then attach themselves to the "wrist joints" to form the complete wing.