THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Mechanical digestion in the oral cavity consists of grinding of food into smaller pieces by the teeth, a process called mastication. Chemical digestion in the mouth is minor but consists of salivary amylase (ptyalin, or alpha-amylase) and lingual lipase, both contained in the saliva.

Detailed explanation-2: -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. Amylase is an enzyme in the saliva that begins the process of digestion in the body. It breaks down carbohydrates into their monomers, monosaccharides.

Detailed explanation-3: -After you take your first bite of pie, your salivary glands produce saliva-a mixture of secretions that help lubricate and break down food. Besides having salivary glands in the lining of your mouth, you have three pairs of larger salivary glands-the parotid, sublingual and submandibular glands.