THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Digestion begins immediately in the oral cavity with both mechanical and chemical digestion. Mechanical digestion in the oral cavity consists of grinding of food into smaller pieces by the teeth, a process called mastication.

Detailed explanation-2: -Mechanical digestion begins in your mouth with chewing, then moves to churning in the stomach and segmentation in the small intestine. Peristalsis is also part of mechanical digestion.

Detailed explanation-3: -The organs that perform both mechanical digestion and chemical digestion are the mouth and the stomach. Mechanical digestion includes the physical break down of food. In the mouth, the teeth macerate the food and grind it up into a bolus. The bolus is swallowed and goes through the esophagus and into the stomach.