ANATOMY

Detailed explanation-1: -Lipids, proteins, and complex carbohydrates are broken down into small and absorbable units (digested), principally in the small intestine. The products of digestion, including vitamins, minerals, and water, which cross the mucosa and enter the lymph or the blood (Absorption).

Detailed explanation-2: -Enzymes help disassemble big molecules such as carbs, proteins, and fats into smaller ones that are easily absorbed into the bloodstream. The simple sugars that come from carbs, the amino acids that come from proteins, and the fatty acids that come from fats.

Detailed explanation-3: -Key Points. Protein digestion occurs in the stomach and the duodenum through the action of three main enzymes: pepsin, secreted by the stomach, and trypsin and chymotrypsin, secreted by the pancreas. During carbohydrate digestion the bonds between glucose molecules are broken by salivary and pancreatic amylase.

Detailed explanation-4: -There are three carbohydrate products which are absorbed by the small intestine; glucose, galactose and fructose. Digestion of starch is initiated in the mouth, facilitated by salivary amylase.