Teeth

Your teeth are part of your digestive system. They break down foods by crushing or cutting them before you swallow. Most humans have 32 teeth, although some have more and some have fewer. Enamel (the protective outer layer of your teeth) is the hardest substance in the human body.

What are teeth?

Your teeth play a big role in digestion. They cut and crush foods, making them easier to swallow.

Though they look more like bones, teeth are actually ectodermal organs. Other ectodermal organs include your hair, skin and sweat glands.