Final answer:
Mechanical digestion in the mouth is called mastication. It involves chewing and grinding food into smaller pieces using the teeth.
Step-by-step explanation:
In the mouth, mechanical digestion begins with the process called mastication. This process involves the chewing and grinding of food using the teeth. As the food mixes with saliva, it is broken down into smaller pieces, forming a soft mass called a bolus. The bolus can then be easily swallowed and transported to the stomach for further digestion.
Learn more about Mechanical digestion in the mouth