Simplify the following text for a Grade 8 native English-speaking person.
Original: It is a minutely toothed , chitinous ribbon , which is typically used for scraping or cutting food before the food enters the esophagus .
Simplified: The radula is the toothed chitinous ribbon in the mouth of most mollusks , that can be compared with the tongue of human beings . Unlike our tongue it is used for cutting and chewing food before it enters the esophagus .