Actually, there are numerous differences. For instance, bones are living tissue, while the majority of the tooth is not (their dentin and pulp are). Because bones are living tissue, they can heal, whereas a damaged tooth cannot. Their overall composition differs, with bones being mostly structural proteins (also some hematopoietic and stromal tissues) with a minority being minerals and teeth being almost entirely minerals. Also, bones arise from the mesoderm and teeth from the ectoderm. I am too lazy to look it up, but I am 80% sure there are plenty of animals with teeth fused to their jaw bones and are not removable, though.
Also, teeth are stronger than bone. Look at the curved roots of a wisdom tooth, something has to deform when the tooth is pulled out; it's the bone. We wouldn't haven't evolved teeth if bone was strong enough. As for guest knowing stuff, maybe it's their job, or maybe they watch YouTube channels like "smarter every day", "today I found out", "Vsauce", or pretty much anything by the PBS network. Learning is easy and entertaining nowadays.
Comments