Food digestion in the human body occurs in two processes. Mechanical and Chemical.
1. Mechanical Digestion: The process in which food moves inside the alimentary canal through circulatory action is called mechanical digestion. During this time food is broken down into tiny pieces, chewed, digested and transported.
2. Chemical Digestion: The process in which complex food is converted into simple and absorbable material with the help of acid, acid, alkali and enzymes through a series of reactions is called chemical digestion.