Mastication: also called grinding, is a physical process of converting large food particles into smaller ones with the help of teeth.
Drinking: Intake of liquids into the digestive system.
Secretions: are the products of digestive glands that are rich in digestive enzymes. e.g. gastric juice, bile, saliva etc.
Ingesta: Food mixed with digestive secretions passing through GI tract is known as ingesta.
Swallowing/deglutition: is act of passage of food bolus from mouth to esophagus
Saliva: is secretion of salivary (parotid, mandibular and sublingual) glands. Saliva contains enzyme ptyalin (?-amylase) and mucus. It mixes with food in mouth.
