NEET PG DENTAL EXAM

Detailed explanation-1: -The large pieces of food that are ingested have to be broken into smaller particles that can be acted upon by various enzymes. This is mechanical digestion, which begins in the mouth with chewing or mastication and continues with churning and mixing actions in the stomach.

Detailed explanation-2: -In the stomach, food undergoes chemical and mechanical digestion. Here, peristaltic contractions (mechanical digestion) churn the bolus, which mixes with strong digestive juices that the stomach lining cells secrete (chemical digestion).

Detailed explanation-3: -In mechanical digestion, food is physically broken down into smaller pieces by tearing, slicing, churning and mixing. In chemical digestion, chemicals produced by the body break down food into very small pieces.