Final answer:
Teeth (dentes) are bone-like organs that help in breaking down food, and humans have two sets of teeth in their lifetime: deciduous or "baby" teeth, and permanent teeth.
Step-by-step explanation:
The teeth, or dentes (singular = dens), are organs similar to bones that you use to tear, grind, and otherwise mechanically break down food. There are different types of teeth, such as incisors, canines, premolars, and molars, each serving a different purpose in the process of chewing and digesting food. Humans, like most mammals, are diphyodonts, meaning they have two sets of teeth in their lifetime: deciduous or "baby" teeth, and permanent teeth.