AP BIOLOGY

Detailed explanation-1: -Mechanical digestion in the oral cavity consists of grinding of food into smaller pieces by the teeth, a process called mastication.

Detailed explanation-2: -Digestion is the process by which food and drink are broken down into their smallest parts so the body can use them to build and nourish cells and to provide energy.

Detailed explanation-3: -The Mouth The mouth breaks down food by both mechanical and chemical digestion. Your teeth carry out mechanical digestion. The fluid in your mouth is called saliva. Saliva plays an important role in chemical digestion.

Detailed explanation-4: -Mechanical digestion begins in your mouth with chewing, then moves to churning in the stomach and segmentation in the small intestine.