APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -The correct answer is carbohydrates. Carbohydrates are first digested in the mouth. The process of digestion in humans starts from the mouth. The saliva secreted by the salivary glands contains the enzyme ptyalin, which acts upon some polysaccharides and breakdown into disaccharides like maltose.

Detailed explanation-2: -The digestion of carbohydrates begins in the mouth. The salivary enzyme amylase begins the breakdown of food starches into maltose, a disaccharide. As the bolus of food travels through the esophagus to the stomach, no significant digestion of carbohydrates takes place.

Detailed explanation-3: -Digestion of starches into glucose molecules starts in the mouth, but primarily takes place in the small intestine by the action of specific enzymes secreted from the pancreas (e.g. -amylase and -glucosidase).