Uninstall Chrome in Windows XP. 1  Close all Chrome windows and tabs. 2  Go to the& Start menu Control Panel. 3  Click Add or Remove Programs. 4  Double-click Google Chrome. 5  Click Remove. 6  Click Uninstall from the confirmation dialog.
In chemical digestion, enzymes break down food into the small molecules the body can use. In the human digestive system, food enters the mouth and mechanical digestion of the food starts by the action of mastication (chewing), a form of mechanical digestion, and the wetting contact of saliva.
Digestion Begins. Enzymatic digestion occurs primarily in the mouth, stomach and small intestine. Both physical and chemical digestion begin in the mouth: the process of chewing grinds up food and mixes it with saliva, which contains an enzyme called salivary amylase. Enzymes facilitate chemical reactions by binding to reactive molecules.