Incredibly, the narwhal’s only visible tooth is outside of its mouth. Its tusk, in fact, is a giant canine tooth—that can grow as long as 9 feet—with a distinct left-hand spiral, ... (tissue structure ...

Dog anatomy. The anatomy of dogs varies tremendously from breed to breed, more than in any other animal species, wild or domesticated. ... and teeth for catching, holding, and tearing.

A full set of adult teeth consists of incisors, canines, and molars. Learn more about how many teeth an adult should have and the anatomy and function, here.

Look below the enamel layer of human teeth and you’ll find some key differences between men and women. Sure, you may need a laboratory full of micro-CT imaging capabilities to make it happen ...