An assumption or conclusion that is rationally and logically made, based on the given facts or circumstances. An inference is based off of facts, so the reasoning for the conclusion is often logical. Before she was weighed at the gym, Jill made an inference about Susan's weight based on her knowledge of Susan's eating and workout habits..
The first task of the digestive system is to break down food into a fine pulp (mechanical digestion). When the food is physical broken down, digestive chemicals break the food down into small molecules (chemical digestion). The mouth is the organ in which the process of digestion begins. It starts the process of mechanical digestion by grinding the food with teeth. Also in the mouth, an enzyme called salivary amylase begins to break down long starch molecules into maltose.
Digestion in the Stomach. by Howard F. Loomis Jr., D.C. Digestion begins in the mouth. When you chew your food it is mixed with saliva, which not only supplies moisture but also the carbohydrate-digesting enzyme, amylase. When you eat raw food, its enzymes work with the salivary amylase to begin digestion.