Mouth (oral cavity) - while digestion and absorption of liquids begins when the salivary glands are stimulated by the smell, thoughts of food, or feeling of hunger, the moth is the entry point of food into the body.
Production of Saliva
Production of saliva by the salivary glands is the first step in digestion and prepares the body for the meal and the processing of the pieces of food. It does so by helping to lubricate and package the bits of food together as they proceed into the esophagus.
The tongue's role in digestion and absorption of food and liquid is to move the food bolus and liquid around the mouth while chewing the food mixed with saliva. The tongue also has taste buds that helps distinguish the different flavors.
Digestion of Carbohydrates in the Mouth
Saliva contains an enzyme called amylase. Amylase helps to break down certain carbohydrates.
Next, Throat and Esophagus
The movement of the jaw and tongue help to swallow the food. As you are ready to swallow - a flap automatically covers the entrance of the windpipe (to prevent choking). The food is then pushed down into the esophagus.