Your nose doesn’t have any bones actually – instead it’s supported by stuff called cartilage. Cartilage is also found in joints, so maybe if you’ve ever paid attention when eating a chicken leg, for example, you’ll have noticed the white-ish cartilage at the ends of the bones.
Anyway, cartilage isn’t as hard or strong as bone, so like flesh it gets degraded – and that’s why skulls just have a hole where the nose should be!
You are completely right to come up with this question – why do we talk of ‘nose bones’, but don’t see one after the body has decomposed to leave the rest of the skull. It’s a great observation.
The hard bridge of the human nose is made of a material called cartilage. Cartilage is a connective tissue which is also found in the joints between bones. It is stiffer than muscle, but less stiff than bone.
When the body decomposes, cartilage too degrades – which is why it isn’t seen in human skeletons.