- Peristaltic movement: The wave-like muscular contractions that push food through the digestive tract (alimentary canal). Thus, A maps to 2 (Alimentary canal). - Gastric glands: Glands located in the lining of the stomach that secrete gastric juice, containing acid and enzymes for digestion. Thus, B maps to 3 (Inner lining of stomach). - Amylase: An enzyme that breaks down starch (a carbohydrate) into simpler sugars. Salivary amylase is present in saliva and initiates starch digestion in the mouth. Pancreatic amylase is also produced. Thus, C maps to 1 (Saliva). - Bile juice: A digestive fluid produced by the liver that helps in the digestion and absorption of fats. It is stored in the gallbladder and released into the small intestine. Thus, D maps to 4 (Liver).