starches and fats
Figure 16.5 a Digestion of food begins in the mouth. b Food is masticated by teeth and moistened by saliva secreted from the salivary glands. Enzymes in the saliva begin to digest starches and fats. With the help of the tongue, the resulting bolus is moved into the esophagus by swallowing. credit: modification of work by Mariana Ruiz Villareal .