1 Click a column heading to select a column. 2  Type the Access tableâs column heading in the Field Name field. 3  Choose a Data type. 4  Indicate if the field should be indexed and, if so, select the type of index. 5  Check the Do Not Import Field box for any column you do not want to import. 6  Click Next.
Digestion happens in the mouth. Mastication (the action of chewing and mechanically breaking down food) triggers you're exocrine glands to excret a watery liquid called saliva.
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.n 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.