Final answer:
Your teeth are involved in the mechanical digestion of food. The front teeth are sharp and used to cut and tear food, while the back teeth are broad and flat for grinding. The tongue pushes the food towards the back of the mouth, allowing you to swallow.
Step-by-step explanation:
Your teeth also help digest food. Your front teeth are sharp. They cut and tear food when you bite into it. Your back teeth are broad and flat. They grind food into smaller pieces when you chew. Chewing is part of mechanical digestion. Your tongue pushes the food to the back of your mouth so you can swallow it. When you swallow, the lump of chewed food passes down your throat to your esophagus.