THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Where does chemical digestion begin? Chemical digestion begins in your mouth. As you chew, your salivary glands release saliva into your mouth. The saliva contains digestive enzymes that start off the process of chemical digestion.

Detailed explanation-2: -The salivary enzyme amylase begins the breakdown of food starches into maltose, a disaccharide.

Detailed explanation-3: -Chemical digestion begins in your mouth with your saliva. The process continues in your stomach and is completed in your small intestine.