ANATOMY

Detailed explanation-1: -Four examples of chemical digestion are amylase in the saliva, hydrochloric acid in the stomach, pepsin in the stomach, and lipase in the small intestine.

Detailed explanation-2: -The stomach would be digested with the help of gastric juice and small and large intestine would be digested with the help of intestinal juice. So esophagus does not contribute to chemical digestion.

Detailed explanation-3: -There are 2 types of digestion: mechanical and chemical digestion. 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.

Detailed explanation-4: -Hence, the following step not involved during the digestion process is acid processing.